In the 26th century, a group of alien races come
together to form a military alliance called the Covenant. Their goal is to find the superweapon
known as Halo to kill all humans. Meanwhile the humans leave Earth and form a colony on the planet
Reach. The U.N.S.C or United Nations Space Command starts a program to train Spartans, supersoldiers
who are genetically modified to be superior. During his last mission, Master Chief also known
as John had his body taken over by an A.I. known as Cortana to be able to defeat the enemy. Now
he’s on the verge of death, so while doctors take care of him, they have to sever the connection
with Cortana to save him. Six months later, John and his team of Spartans have a mission in
the Branta System. At the local village, soldiers are trying to evacuate the people. They explain
it’s only temporary until the danger has passed, but the leader known as The Mother refuses to
leave their land and when the soldiers try to force them, the people riot. As the Covenant
forces arrive on the planet, John and another Spartan search the area and find a few soldiers
lost in the fog, which causes their communicators to malfunction. Suddenly a soldier sees something
in the fog and disappears, so they try opening fire to no avail. More soldiers get snatched
until there’s only John and Perez left. At that moment John can smell the creature and moves
out of the way right before it attacks. A fight starts between them and Perez tries to shoot to
help, only to get knocked down. John immediately retaliates and after some struggle he manages to
kill the alien. Then he searches for Perez in the fog, only to be attacked by more aliens. John
fights them all without issue, killing them one by one with no mercy. He continues his search and
finds the bodies of all the soldiers plus Perez, who is hurt but still alive. Suddenly a bunch
of aliens including the mighty Arbiter surround them but instead of attacking they go away, and
John sees a mysterious figure standing nearby. At that moment the Covenant forces attack with huge
energy beams that start destroying the planet. Most of the locals are finally scared enough
to rush to the spaceship to evacuate, but the Mother and her followers still stay to meet the
planet’s end. When they return to headquarters, John talks to Ackerson, the new boss in charge
of the Spartan, and tries to explain that the Convenant are preparing for something big. However
Ackerson doesn’t believe John’s story about those aliens suddenly disappearing and thinks he’s
having hallucinations as a side-effect of Cortana. Afterward John secretly visits former
admiral Margaret, who is now just a civilian. She asks him to find more evidence of Covenant’s
plans and to bring it to her, and she promises to believe him in return. Meanwhile on The Rubble,
former Spartan Soren and his crew free a criminal named Felix from prison because he claims to know
the location of Doctor Halsey, the woman who had started the Spartan program and is now wanted by
the law. Following Felix's directions, they find a destroyed ship and Soren and Felix suit up to go
investigate. After crossing a dangerous bridge, they make it to the cargo hold, but when Soren
opens the capsule it’s empty. At that moment his spaceship goes away and a bunch of soldiers appear
to arrest Soren, revealing this is a trap by Felix who wants to get the bounty on Soren. In a secret
location, Halsey interrogates a young girl named Julia about what happens when she leaves the room.
Julia tells her about a hallway and several rooms that she isn’t allowed to look into. Before
the doctor can ask for more details, Julia’s nose starts bleeding and she dies. Sometime later,
Halsey tries questioning a new Julia, but the same happens: her nose bleeds and she drops dead. In a
refugee camp, a man is scanning all the locals to find indentured slaves who should get back to
work. Kwan hides in a tunnel and tries to take the tracker off her ear, but unfortunately she’s
caught red-handed and has to run away. When a man corners her on a platform, she pushes the guy to
the ground. Another guy continues to chase her, so she breaks a bottle on his head to
bring him down. More men come after her, thus Kwan jumps into the trash tunnel to escape.
Then she removes the tracker and hides. The men soon arrive and begin looking for her, but when
a guy turns around, he discovers Kwan pushed his partner out into space. When Kwan tries to sneak
out, the last guy jumps on her, so she stabs him in the head with her tracker. Afterward Kwan meets
with Soren’s son Kessler and tries to tell him he and his mom are in danger. When Kessler says his
dad will protect them, Kwan has to inform him that Soren isn’t coming back. At the same time Soren’s
wife Laera is getting suspicious of her husband’s crew, who promised they would look for him but
they aren’t making much effort. At headquarters, John admits to fellow Spartan Kai that he thinks
the mysterious person who made the aliens leave during the fight had been Makee, his ex-girlfriend
and member of the Covenant who is supposed to be dead. At that moment John sees an employee change
the sign on the Cobalt team to “Standby”, which doesn’t make sense because they’re supposed to be
on a mission. John goes to ask Ackerson about it, but he dismisses his worries. Meanwhile Spartan
Riz trains in the facility while trying to hide her injuries. She doesn’t want the others to know
or they’ll think she’s weak and take her out of missions. Later during a training exercise
on the field, she’s too slow yet denies it, so a Spartan brings her down with a shot.
Desperate to prove she’s fine, Riz climbs away and opens fire to distract them before running
again. She continues to be slow and clumsy, so this time she falls on her own. Later, Riz
finally agrees to see a healer. Back to Halsey, she watches how employees take the dead girl away
and talks to Ackerson, who is the guy keeping her in that house. However Ackerson refuses to answer
her questions and brings her a new Julia clone to be her attendant. At that moment the tree in the
room catches on fire, but Ackerman just leaves, revealing Halsey is in a harmless hologram room.
Afterward Ackerson goes to the room where he’s keeping a Keystone, which is a gadget that can
give him access to Halo. When he’s about to grab it, Cortana appears to inform him she’s
finished the simulation he asked for. Her calculations indicate there’s a 97% probability
of something bad happening, so Ackerman concludes there isn’t anything they can do to stop it.
In the evening John visits Perez to ask her why she isn’t backing his story about the aliens
leaving the battle. Perez admits she did see them, but she feels guilt because all of her men were
killed and she can’t explain how she survived. Then John returns to headquarters and checks the
progress of the Cobalt squad, only to learn they never left the planet. He realizes the Covenant
are disrupting communications before destroying planets and their next target is Reac. Desperate,
John lies to his team and tells them they have permission to save team Cobalt, so they take off.
Seconds later the Covenant arrive at a base on Reach and start killing soldiers, who can’t do
anything against such powerful aliens. Makee is leading the attack and opens a door to steal a
Halo Keystone. Soon John’s team lands on Reach and tries contacting team Cobalt to no avail. They
search the area and enter a building. They notice some abandoned food, which means the people here
left in a hurry. When they activate the power, a weird noise with garbled voices can be heard
on the comms. John recognizes it as the noise he heard during the last attack. At that moment they
hear thumping coming from the basement so they go investigate. Meanwhile Perez falls asleep on her
desk while listening to the recording from her last fight. She’s thumping her finger in the same
rhythm as that noise John heard in that basement. Suddenly a Covenant voice wakes her up. John’s
team approaches a mysterious door only to suddenly be surrounded by soldiers who arrest them for
taking a ship and weapons without authorization. John opens the door anyway, only to find the room
empty. When John’s team returns to headquarters, Admiral Keyes scolds them for insubordination and
suspends them all. John is sure that team Cobalt had been in that building, and Keyes shows him
the flight path proving the opposite, John says he saw a different file and that someone changed
it. Keyes decides to submit John to neurochemical monitoring and his team doesn’t know if they can
trust him anymore. Moments later two guards escort John to his psych evaluation, but as soon as they
enter the elevator, John knocks them out. At the same time Kai tries to explain to Ackerson that
the rest of the team had been tricked by John and they hadn’t known the mission wasn’t authorized.
Ackerson doesn’t care and informs her that John has escaped, so Kai volunteers to help. Meanwhile
team Cobalt has been found dead near the building John searched. Ackerson says they’ll officially
list the bodies as M.I.A. , causing Keyes to get angry because John had been right all along and
obviously Ackerson knew it. However Ackerson calls the Covenant's arrival inevitable and even admits
their superiors already know about the situation. If they send out an alert it'll cause chaos and
panic, so it’s better to start getting ready for an evacuation quietly. On The Rubble, Laera is
suddenly dragged into a tunnel so she tries to defend herself, but it turns out to be Kwan.
She warns Laera that she’s in danger because Soren’s crew was bought off, so Laera needs to
leave with Kessler immediately. Laera rushes to her home and finds the crew playing with Kessler.
They inform her they’ve fixed the ship and they can go looking for Soren together, but Laera turns
them down and makes them leave. Later Laera, Kwan, and Kessler sneak around and wait for a large
group of people to get into the boarding area so they can hide among the crowd. They manage to get
into Soren’s ship and take off, but Soren’s old crew sees this and closes the gate. Desperate to
save her son, Laera gives Kwan her necklace to buy tickets and makes her promise to get Kessler out.
Then she gets off the ship and attacks Soren’s crew. Unfortunately she gets quickly overpowered
and captured. Then the crew interrogates Laera while a strange clanging sounds in the background.
The crew is tired of being poor while Soren’s family lives well so they want the money, but
Laera genuinely doesn’t know what they’re talking about and thinks they’re being manipulated. While
some crew members go to investigate where the sound comes from, the others throw Laera into
an airlock to make her talk, but she can’t tell them the location of something that doesn’t exist
and eventually passes out. When Laera wakes up, she finds Kwan with a bloody knife in her hand,
revealing she had made the noise to attract the others and kill them. The last crewmember tries
to ambush them, but Kwan quickly kills her as well. Sometime later, Ackerson goes to say goodbye
to Halsey, who decides to tell Ackerson all the details of how his sister Julia died because her
body couldn’t stand the Spartan augmentations. An upset Ackerson leaves without a word but returns
a second later to leave Soren with her. Meanwhile John meets with Margaret and tells her what’s
going on. He wants to warn everyone about the Covenant coming, but Margaret asks him to stay
quiet for now and play along with orders. John realizes she never truly left the organization and
leaves in a huff. Afterward John goes looking for Perez and finds her at a church. Perez admits
she also saw Makee during their fight and that she hasn’t been able to sleep since then because
she can't get the sound out of her head. Then she gives John the recording from that fight. It's
not just interference or a sound, but something underneath: a message in the Covenant's language
that she translates into a threat to kill all humans. At that moment a blast hits the church and
soon explosions are going off all over the city. People start to panic and run all through the
streets as houses are burned down and death covers every corner. Perez runs to her house but John
stops her just in time before she gets burned too, and he points out her family is gone. As Perez
has a breakdown, a Covenant soldier attacks people while wearing active camouflage, but John can
see it and tackles the alien through a window. A fight ensues and after lots of struggle, John
manages to break the creature’s neck. As power goes out in the colony, the room whith Halsey and
Soren loses the hologram, revealing they're inside a cell. Since alarms are down, they come out to
investigate and realize they’re at headquarters, meaning Halsey knows the way and guides them.
Eventually they find a bunch of soldiers killed by plasma and take their guns. Then they take
another corridor and find the room with Cortana, who tells them to run. Suddenly Cortana disappears
because Makee picks her up and goes away while sending in an alien to attack, so Halsey and Soren
have to run away fast. Back to John and Perez, they run through the city and watch how the
Covenant destroy everything around them, so they have to dodge lots of shots and explosions. In the
sky they can also see ships evacuating people from headquarters. After lots of running they find Riz
and other soldiers doing their best to fight back, so the duo grabs some guns and joins them. The
group has lost communication with headquarters, so John convinces them to make a plan to push
through and make it back to base. After shooting a lot of enemies over a wall, the group sneaks
inside a building, where they are surrounded by a bunch of aliens. They manage to shoot them
down but lose some soldiers in the process. John breaks a window so they can jump out but
Riz takes a moment to grieve for a lost friend, then she throws a grenade at the incoming alien
backup and jumps out as well. At that moment a bigger alien known as wraith appears, so the last
soldier decides to join his fallen comrades and volunteers to run toward the wraith with some
explosives. The creature dies and now John, Pereze, and Riz can keep going. Soon the trio
makes it to headquarters, where dozens of soldiers are being treated for wounds. John and Riz want
to suit up, but they learn Ackerson left with all the Spartan armor. Kai isn’t around either,
which is strange. John goes to confront Keyes, who explains that team Cobalt’s defeat left a
blind spot that allowed the Covenant to land. The decision was made to let Reach fall, so
all major personnel and fleets are gone and the Covenant are hitting all the power stations.
Keyes still wants to fight but their priority should be the evacuation, so he shows John a
plan to proceed. As Reach continues to fall, most of the soldiers head out to continue the
evacuation while others join John and his fellow Spartans Riz and Vannak to make a stand outside
the bridgehead. At headquarters, Keyes is found by Soren and Halsey and he agrees to take them to the
evacuating transport. Halsey informs Keyes that Makee is alive and has Cortana. While the soldiers
on the bridge open fire on the incoming aliens, Keyes’ group makes it to the hangar. Soren hears a
weird noise and suddenly a brunch of elite aliens attack, causing chaos and death to ensue. Keyes
asks the bridge team for help, but they also have their hands full. The normal soldiers tell
the three Spartans to go protect the civilians because they can hold the bridge in the meantime.
At the hangar, the few soldiers there are trying their best to defend the ships. The civilians are
all aboard but the fuel lines are still connected, so Keyes has to leave the transport to
disconnect them. He manages to push the button easily and the pipe falls, spreading fuel
on the ground. Then he’s surrounded by aliens, so Keyes tells Perez to pilot the ship and leave
without him. As the ship takes off, Keyes lights his pipe and causes a huge explosion that brings
down all the aliens in the hangar. Halsey, Soren, the Spartans, and most of the soldiers manage to
hide behind the gate just in time and survive the explosion. The group watches the burning city, but
at that moment another explosion starts another fight. No matter how much they shoot, the aliens
just keep coming, and John jumps in to fight the Arbiter hand-to-hand. He manages to steal a plasma
sword only to be quickly shot down, and when the Arbiter is about to finish him, Makee shows up to
stop him. Vannak tries to use the distraction to attack the aliens from behind, but the Arbiter is
fast and kills him first with an exploding dart. Makee leaves with the Arbiter while John’s team
has to keep on fighting incoming enemies. After lots of shooting, things suddenly go quiet,
and an extra dangerous alien falls through the ceiling. The soldiers work together and shoot
at the same time, surrounding it with fire until the enemy goes down. Then a ship appears near the
hole in the wall: it’s Laera, who opens the door for them. While the soldiers rush inside, Kwan
uses a machine gun to fire at the aliens that keep coming. However Riz refuses to leave Vannak
behind and runs into the smoke. Seconds later she comes back with Vannak’s body on her shoulders.
Unfortunately an alien still manages to hit her on the back and she falls, so Kwan and Laera rush
to drag her body inside. The ship takes off while John watches the city go down before passing
out. Halsey runs to his side while John has a flashback of the time he almost died six months
ago. Cortana begged Margaret to save John, and Margaret agreed as long as Cortana did something
for her in return. In another ship, Makee watches Reach burn before telling Arbiter that she has to
access Cortana to find Halo's location. After many failed tries, Cortana finally appears in front
of her, but refuses to share any information about John. Makee gets angry and threatens her,
but Cortana just disappears. When John awakens, he sees Riz has been intubated. Halsey informs
him Riz will need surgery to live, but she doesn’t have the tools to do it here. She also reveals
John just woke up from a two-day coma and they haven’t gotten in contact with any other teams or
ships yet. A desperate John wants to go back for any survivors, but Halsey tells him there aren’t
any. Then John passes out because of a fever and sleeps for another three days. They still can’t
make contact with anyone, so for now the ship lands on a mining outpost called Aleria. Halsey
takes Riz to a hospital to do the surgery while Soren and Laera look for their son, who supposedly
is hiding on this planet. The couple enters a shop and pays the clerk for information about their
son. Afterward they get on a truck to go to the right address, and as a way to grieve for their
losses, Laera takes off her wig and throws it away. Eventually Laera and Soren arrive at a plant
and find a house inside. The women who open the door refuse to give them back the kid, saying he’s
theirs now. Laera gets furious, so Soren drags her out and asks her to leave negotiations to him.
While Soren offers a heartful speech to the women, Laera hears a noise and follows it to find a
boy with a helmet. However when she removes it, she discovers it’s not Kessler. The boy says he
saw Kessler in the ship and he was taken away. Moments later Riz wakes from the surgery. Halsey
explains that she did everything she could but the damage is significant and she won't be the soldier
she was before. Meanwhile Kwan drags Vannak's body uphill and digs a grave for him. Suddenly she’s
surrounded by a group of people in red cloaks. John hears Kwan’s shouting and runs to help her.
It turns out the locals are against burials and think Vannak should be burned so he can find his
way. John doesn’t understand grief and tells Kwan to put Vannak in the sky. Soon Riz and Halsey join
them and after sharing some words, John is the one to light Vannak’s body on fire. While watching the
flames, Kwan hears a voice telling her to “join them”. Suddenly The Mother appears in front of her
and everyone else disappears, making her realize she’s on a spiritual plane. The Mother explains
she speaks for all the planets and scolds Kwan for forgetting where she comes from. She tells her the
monster is close and begs Kwan for help, calling her a protector. After seeing a mysterious vision,
Kwan is back at the funeral. Back to Makee, she’s shocked to see they’re going back to Covenant
headquarters. The Arbiter explains the fleet was recalled because their superiors consider
their mission failed. An argument ensues between the Arbiter and Makee, who explains it’s them who
have the necessary power and not the priests. The Arbiter thinks she’s trying to manipulate him, but
at that moment Cortana plays an image of the Halo. Makee uses this to make the Arbiter think he's
causing this because it's his destiny just like hers. Convinced, the Arbiter steers the ship away.
The next day, Laera returns to the shop and covers a bat with barbed wire to threaten the clerk until
he confesses the truth: it was the U.N.S.C. who took Kessler. Meanwhile Riz has to move around
with a cane and continuously feels pain, so she informs John she’ll stay on that planet because
her fight is over. John is devastated because Riz is all he has left of his team, but Riz says
goodbye to him with a hug. At a training facility on planet Onyx, Ackerson watches Kai put on her
Spartan suit and meet with thousands of soldiers who accept her as their leader. He’s successfully
manipulated her by making her think all the other Spartans are dead. One of those soldiers is Perez,
who joins a smaller team on a mission to take down a Covenant ship by deploying a virus. The group
jumps out of a ship and the Covenant immediately open fire on them, bringing down a few soldiers.
The remaining fighters manage to get inside and an intense battle ensues as more and more soldiers
are brought down by the enemy. Perez manages to run fast enough to reach the console but when
she’s about to inject the virus she’s shot too and wakes up in a chair, revealing this was a training
simulation run by Kai. She scolds the team for not working as a team and puts them through the
simulation again. Perez doesn’t follow orders because she thinks following the same plan will
make them fail again, and this time they manage to finish the mission. Back to John’s team, they
arrive at Onyx and quickly split. Kwan continues to see The Mother among the trees so she follows
her while Halsey tells Laera where to find Kessler before leaving the group as well. John tells the
couple to go find their son while he comes out to fight the soldiers patrolling the area. He defeats
them all in seconds without breaking a sweat, however a bigger army soon arrives and arrests
him. Kwan is still running through the forest and sees The Mother standing next to a well,
so she jumps into it and is caught by a weird light. There she finds Halsey, who reveals this is
where everything began. As they explore the area, Halsey explains that she lived in this underground
facility for around two decades. However she soon gets lost, claiming the facility has been changed.
Kwan sees The Mother guiding her, so she follows her with Hansley behind her. Eventually they
find a lab where Hansley’s old team is secretly carrying on her research. On a mysterious
structure, they’ve found a DNA strand that was a mix of both human and the Covenant. When
Kwan touches the structure, a little gem starts glowing. She takes it out and a star map appears
in front of them. As she moves the gem around, she activates the map’s secrets and opens the
structure, revealing a light bridge that takes them to an ancient lab. They find the remains of a
scientist who appears almost human, but when they touch it to grab a little box, the building starts
shaking. The group runs away and reaches the other side right before the light bridge disappears,
seeing in the abyss a huge alien city. Meanwhile a priest finds the Arbiter and Makee, intending
to kill them for disobeying orders. The Arbiter manages to scare him away, but he demands Makee
to solve things soon. Makee swears she can control the Keystones, but once the Arbiter is out of the
room, Cortana appears and says she knows Makee’s lying. It turns out Makee needs to be with John
to reach Halo. Cortana offers her help to Makee but in return she requests to be connected to the
ship’s system. Makee is suspicious of Cortana’s motives but has no other choice. In the training
facility, soldiers take John to a cell to chain him up, but he quickly defends himself and brings
them all down in a matter of seconds. All this is recorded by the security cameras and Ackerson
shows it to Kai, saying John is working for the Covenant and he’s here to steal the Keystone
Ackerson managed to smuggle out of Reach when he escaped. John leaves the cell and carefully
sneaks around until he finds a computer room, where he’s confronted by Kai. He tries to explain
that Ackerson has manipulated her, but Kai doesn’t believe him and starts fighting him. They’re
both Spartans with the same augmentations, but Kai has her suit and John doesn’t, not to
mention he doesn’t want to hurt her so he isn’t using his whole strength. Kai overpowers John and
beats him up, leaving his bleeding body on the floor before exiting the room. At that moment the
computers at the facility start failing as Cortana suddenly takes over. She appears before John and
tells him she’s with the Convenant, so he needs to find the Keystone to connect with Makee and stop
her. Then she appears next to Margaret to give her an update, and Margaret reminds her of their
agreement: Cortana must stay with the Covenant and continue to spy on Makee. Meanwhile Kai confronts
Ackerson because she’s realized he manipulated the training simulation. As he offers another
manipulative speech, Kai realizes John had been telling the truth. Ackerson admits he lied and
Kai rushes out to help John. Speaking of John, he moves through the facility without issues because
Cortana opens and closes any door he needs to keep him safe. On Makee’s ship, the priest discovers
the transmission sent by Cortana and orders the Arbiter to kill Makee. However the Arbiter refuses
to obey and ends up fighting the priest’s guards. As chaos ensues in the ship, Makee notices her
Keystone glowing and crawls to it at the same time John finds the one at the facility. John’s
and Makee’s consciousnesses appear in Halo, and John asks Makee not to help the Covenant
because they’ll eradicate humanity. However Makee doesn’t want the Covenant nor humans to control
Halo, she wants John to join her there and build a new world together after destroying both races.
At that moment soldiers of both sides threaten to attack them, so they both let go of the Keystones
and the resulting shockwave pushes everyone away. The Arbiter continues to fight the guards and
Makee grabs Cortana to run away. The priest chases after her, so Cortana appears in front of him to
distract him. Makee uses the chance to stab him from behind, and Cortana confirms that thanks to
Makee’s talk with John she’s found Halo’s location in the map. Afterward Makee thanks the Arbiter for
defending her by getting his symbol on her chest. At the training facility, the technicians track
Cortana’s transmission to the Covenant fleet and Margaret orders Ackerson to prepare the soldiers
for an attack. Meanwhile a bunch of soldiers surround John, however they refuse to follow their
general’s orders and leave. The general is furious but before she can act, Kai knocks her out from
behind. Moments later the soldiers that went after the Covenant are completely obliterated, and
Margaret decides to send another team. Ackerson protests since they’re wasting resources, but
Margaret says she’s willing to sacrifice their entire army to stop the Covenant from getting
to Halo. Meanwhile Soren and Laera follow the directions Hasley gave Laera, but when Soren
sees where they are, he quickly drags his wife away. It turns out this was the arena where they
threw kids to train them into Spartans, and Soren remembers that Kessler always wanted to be one.
However Leara refuses to leave because she doesn’t want her son to become a mindless killer. When
a bunch of kids appear in the arena for brutal training, Soren jumps in to fight the incoming
soldiers. Unfortunately while he’s fighting, the soldiers use the chance to capture Kessler
and Laena and run away. Soon John finds Ackerson and starts strangling him until Ackerson reveals
where he has kept John’s suit. On their way out, Ackerson reveals that Margaret is a liar and that
the virus that the fleet will use on the Covenant is bigger than they were told. Once activated,
it will burn everything within a million miles, both Covenant and humans. After John and Kai get
their suits, John demands Ackerson to confront Margaret. Ackerson does so, but Margaret just
makes her guards arrest him. This distraction is enough for John to steal a ship and fly toward
Halo. Before leaving, he talks to the entire base through the comms to confirm he’s alive while Kai
leads the soldiers on the mission. Suddenly John is surrounded by darkness and a mysterious voice
tells him about something dark and sinister in a distant facility. In the underground lab, the
team opens the box and discovers there are active spores on it. Soon a lab assistant starts
feeling unwell and she attacks a coworker, stabbing him in the neck. The other scientists
have to pull her back to stop her from causing more damage. Meanwhile Kwan reunites with Soren
at the ship, where he’s gathering weapons to go save his family. When Kai’s team makes it to the
location of the Covenant fleet, an explosion hits their ship and sends them hurtling into space.
After some desperate floating around, they manage to control the suits and get in formation to soon
land on a Covenant ship. The team gets inside but barely gets to explore before the enemy attacks
them. They try their best to defend themselves, but the aliens keep coming and they’re starting
to run low on ammo. Kai requires backup, but Margaret refuses to send help because she
wants the priority to be Halo. Makee sees they’re getting surrounded by humans and asks Cortana for
help, but the A.I. refuses so Makee destroys the device to delete her. Feeling guilty, John decides
to go save Kai’s team instead of going for Halo. Kai and Perez get separated from the group and
try to fight back with the aliens’ own weapons, but they’re still surrounded. When they think
it’s over, John shows up and starts killing aliens with amazing combat skills. Once all the
enemies are down, John carries a wounded Perez away but Kai stays behind to finish something.
In the facility’s prison, Kessler, Ackerson, and Laera notice the crazy lab assistant in
another cell but they don’t see the creepy bug coming out of her. Later when Kwan and Soren
arrive, they discover all the guards are frozen in place. In the cells, Laera screams because the lab
assistant’s body is mutating and reaches through the bars with a creepy arm. Luckily Ackerson is
armed and immediately shoots her down, but other prisoners are mutating as well. Soren and Kwan
hear the screams and follow them, arriving just in time to shoot the monsters down and rescue
Soren’s family plus Ackerson. Back to John, he leaves Perez with the health unit and jumps
out while he still hears the weird voice in his head. He reaches the main Covenant ship and finds
no Makee, but Cortana’s gadget is destroyed on the ground. Suddenly Cortana talks, revealing that
she’s integrated herself into the ship’s system. She warns John that it’s too late because the
ship is on a collision course. Without hesitation, John smashes the ship’s console and integrates
himself with the A.I. . The ship crashes but John wakes up unharmed inside Halo. After picking
up a plasma blade, John goes looking for Makee. At the same time Kai crashes a Covenant ship
into a Covenant Assault Carrier. This gives humans the upper hand in the battle but also
kills her in the process. At the facility, Margaret orders the soldiers to bring Halsey.
Margaret wants her to talk sense into John, but Halsey refuses to help. Suddenly the
technicians start attacking each other, meaning Halsey has brought the spore with her. The
crew starts mutating and shows creepy alien parts, so Halsey runs out of the room and locks the
door while Margaret is caught in the chaos. She makes it back to the lab and while looking
at the research she suddenly freezes. A mark on her neck shows she’s infected as well. The other
scientists put her in a cryogenic chamber to halt the infection until they can find a cure.
As Ackerson leads the group out of prison, they’re surrounded by more mutants, so they open
fire to defend themselves. Kwan is surrounded and closes her eyes waiting for the end, but instead
The Mother appears and tells her that only she can save everyone. Thanks to The Mother’s power
freezing the mutants, Kwan can run away and rejoin the others to escape. Once everyone is out, Laera
closes the door while she’s still inside because she’s also infected. Moments later, John finds
Makee and the Arbiter. The warriors can finally finish their duel and a vicious fight begins. Both
of them use all the strength and after exchanging a variety of blows and shots, John knocks the
Arbiter down and kills him with the plasma blade. Then Makee opens the door to an ancient
building and again offers John to work together, but he refuses. Suddenly a series of structures
rise from the Halo’s surface at the same time the human fleet enters Halo’s atmosphere. Makee
enters the building and John follows her, finally finding a machine with the
voice he’s been hearing in his head.
