In the near future, mysterious creatures appear out of nowhere and start killing mankind,
causing an apocalyptic event that doesn’t leave many survivors. There are many theories about
what happened, like a bug carrying an infection, a purple haze, and a punishment for humanity,
but they’re all rumors and nobody has the real story. In town, Paul is looking for supplies when
suddenly the sirens start wailing. He immediately runs out and makes his way through the streets,
hiding when necessary and moving away from any screams and bombs. As the city gets covered in
black smoke, Paul makes it to an abandoned house in the outskirts where he reunites with his
babies, who he must take care of alone. Fifteen years later, Paul’s boys have grown into healthy
teenagers. They live in the same house and go out during the day to search for supplies, but they
stay hidden at night. As soon as the sun starts to set, Joseph covers the windows and tells their
dog Rocco to get in the house. Paul waits outside until he sees Thomas come back and scolds him for
being late. Thomas explains that he likes helping their neighbors the Rose family, who have a farm.
Then the three of them make sure to lock every door and window before having dinner. Paul scolds
Thomas once more, saying that if he ever is late again he won’t be allowed to leave the boundaries
anymore. Joseph mocks his brother for it and an argument soon escalates into a physical fight,
but Paul quickly stops them and reminds them that they’re men, not animals. After dinner,
Paul watches his sons play chess but gets distracted when Rocco begins scratching and
growling at the floor. Seeing it as an omen, Paul and Thomas go downstairs and are startled by the
sudden banging on the door. It seems the creatures are trying to get in, so they immediately hold the
door to stop them from forcing it open. There’s lots of shaking and pounding for several seconds
until the creatures give up and leave. Then Thomas calls Joseph out for not helping,
but Joseph reveals he’s been listening to learn more. There were three attempts: the first one
was ten seconds, the second was twenty, and the last one just one. Joseph believes that the first
was a test and the second was the actual attempt to break through while the third one was just a
frustrated hit. The next day, they check the door and see all the claw marks on the wood. The door
has lost strength, so Paul and his boys go out to look for wood to reinforce it. They bring
all their findings back to the house and while Thomas chops the wood, Paul checks on Joseph,
who is building something in the barn. After some prodding from Paul, Joseph admits he’s been trying
to build a vehicle because he’s tired of feeling confined and scared. However he can’t make it
work. Paul is impressed and takes a look, quickly making a couple of changes that finally makes the
car run. Excited, Paul takes the teens on a ride to teach them how to drive. They go home after an
hour of wandering and Paul announces the windows still need reinforcement, so he sends the boys to
the river to salvage. Thomas gets mad because he had been promised he could go to the farm today,
but Paul says this is more important. The brothers leave in the car and Thomas starts blaming Joseph
for this, saying Paul sent Thomas too just to protect his brother. Joseph doesn’t think
he needs protection, so Thomas gets out of the car when they pass by the farm and asks Joseph
to pick him up on the way back. In the house, Paul finishes reinforcing the door and takes a
break to smoke alone by the waterfall. As he looks around, he sees a black creepy hole in
the rocks. Meanwhile Joseph goes to the river and ties himself to the car before descending into an
old abandoned ship to look for supplies. Inside a locker he finds a pinup from a dirty magazine,
which leaves him speechless for a second. Then he looks further inside and is suddenly startled when
a bunch of bugs come out from a trash pile. They fly around him and try to reach his skin, so he
has to get out of there fast. At the farm, Thomas helps the family with the chores but it’s soon
revealed that his main reason to go there is the owners’ daughter Charlotte. It’s clear that the
teens have a crush on each other and they go for a walk together on the field. Charlotte shows Thomas
a rope tied to a tree, explaining that when she was little, she was only allowed to play outside
if she was touching the tree, so she would tie herself to have more room to run while technically
still attached to the tree. They also play a game in which they share crazy theories about what
caused the apocalypse. When it’s time for Thomas to go, Charlotte gives him a tight hug. The sun
is starting to set, so both boys need to hurry up. Paul returns home and gets worried when he finds
Rocco but neither of his sons. Joseph gets back in the car and at first it wouldn’t start, but after
a few tries he finally gets it moving. Thomas is running as fast as he can and slips, so he ends up
falling in a crevice in the ground. When Joseph comes by to pick up his brother, he doesn’t see
him around and just keeps going. Once he makes it home and tells his dad what happened, Paul tells
him to get inside and lock everything up while he and Rocco look for Thomas. In the crevice,
Thomas wakes up with a very sore body. Using a lighter, he begins looking around the area and is
shocked to see a creature reaching through a hole in the wall. It even screeches, which is heard by
Paul and Rocco. Moving carefully, Thomas takes out a little knife and stabs the monster’s hand,
causing it to retreat into the hole. However when Thomas steps back, a second creature appears above
and grabs his face. Thomas has trouble breathing but before he can pass out, Paul arrives and pulls
the monster back to quickly kill it. After making sure Thomas is fine, Paul and Rocco find a tunnel
that takes them right into the crevice. It’s dangerous to run through the forest at this hour,
so they decide to stay in the crevice until sunrise for protection and block the entrance.
They can hear the creatures coming through the hole so they get a flare ready, only for the
ground to start shaking. It turns out the monsters are now moving underground and trapping the group
in the crevice by covering the exit with dirt. As Rocco keeps on barking and the crevice won’t stop
rumbling, Paul tells his son and the dog to move back as he puts the flare inside the hole that
is opening in the ground. When the creatures try to reach out, Paul creates a small explosion that
sadly hits him as well. In the house, Joseph hears lots of creaking and starts planning. Minutes
later he sits in front of the main door with a rope tied to his chair, and he falls asleep.
Soon a creature moves the wood covering a hole in the door and reaches inside, making its nail grow
to test if Joseph is truly asleep. When the boy doesn’t react, the creature comes inside, only
for Joseph to reveal he was pretending and pull the rope. A cage falls from the ceiling, instantly
capturing the creature. Proud of himself, Joseph covers the cage with a blanket and goes to sleep.
The next morning, he’s worried because the others haven’t come back yet, so he goes out in the car
to search. Meanwhile Thomas has dug through the fallen dirt to open the entrance again and is
dragging his heavily wounded dad out. Rocco comes out as well and follows the noise of the car to
find Joseph and guide him back to his family. The brothers immediately work together to carry
Paul to the car and then to his bed at the house. While they discuss how to proceed, Thomas finally
notices the cage and looks under the blanket, which causes the creature to go crazy. Joseph
immediately puts the blanket back, explaining that light hurts the monsters. Then they bandage Paul’s
wounds while Joseph explains that last night the creature took eight seconds to come in,
the shortest time yet. He’s also sure there was a second creature that went away. Their behavior
is changing too quickly and Joseph concludes something isn’t right. Thomas points out that
the creatures are smart: last night they killed a bunch in the cave and maybe they came here for
revenge, because Charlotte said they rarely go to the farm. Joseph doesn’t think “they” killed
the creatures, he thinks only Paul did it. To prove himself, Thomas tries to kill the creature
in the cage. Joseph tries to stop him because he wants to study it and in the struggle the monster
comes out, quickly hiding under the bed. When it finally peeks out, Rocco starts barking at it,
so the monster transforms to attack. Joseph rushes to hold it down and Thomas then cuts its head off
with an ax. Still wanting to learn more, Joseph takes the body to the barn and starts opening it
up while Rocco and a bunch of bugs watch. No matter how much he cuts though, he gains no
further understanding of what it may be. Then Thomas tells him that they should take Paul to
Charlotte’s farm because they have a better house and actual medicine. Joseph doesn’t think the
Roses will help him, but Thomas forces him to come along. The brothers put Paul back in the car and
drive to the farm, where Charlotte’s parents prove Joseph right: they don’t have enough medicine to
spare so they refuse to take in someone hurt so badly. Charlotte protests, but she’s ignored.
However her parents do agree to let Thomas stay, which would leave Paul and Joseph with more
resources at their house. Joseph immediately walks away and when Thomas follows him, an argument
ensues in which Joseph blames Thomas’ for their dad’s incoming death. Furious, Thomas pushes his
brother to the ground and starts choking him, but when he realizes what he’s doing he pulls back.
Joseph immediately gets in the car and drives away with his unconscious father, so Joseph joins the
family at the farm. Afterward Charlotte shares some actual good food with Thomas and shows him
some of her belongings, which Thomas has never seen before. The teens share a sweet moment and
kiss, only to be interrupted by Charlotte’s father who sends his daughter to another room. On his way
back, Joseph notices the sheep running in fear and mounds of dirt everywhere, which means the
creatures are moving underground. When he makes it home, he sees a path of dirt near the wall,
so he fears the monsters may be underneath the house. After taking care of his dad, Joseph goes
to the barn and starts gathering objects to make a new plan. He also starts blocking all the windows
and as he moves around the house, he falls in when he steps on a carpet. There’s a hole under it,
so he concludes the monsters are already inside the building. At the farm, Charlotte finds Thomas
snooping around the kitchen. He’s still worried about his dad, so he wants to find some medicine
and leave. Charlotte gives him the medicine and he thanks her with a hug as he promises to come back,
unaware someone can overhear them. Thomas runs out but before he can reach the gate, a farm employee
points his gun at him, accusing him of stealing. A desperate Thomas tries to explain Charlotte gave
it to him, but the man doesn’t believe him. All the employees team up and take Thomas to the barn,
where they tie him up and play some music to cover up what they’re about to do to him. They
grab Thomas’ legs and a man gets ready to shoot them, but at that moment a hole appears under him
and he falls, failing the shot. The other men run to check on him at the same time a creature jumps
out of the hole. In the main house, Charlotte’s parents wake up when they hear a noise. The father
lights a candle to go investigate, only for a creature to get in the room and attack. The
candle falls and immediately starts a fire while the monster jumps from the father to the mother,
trying to kill them both. The father pulls it back and the mother runs out of the room to find her
daughter, but the creature jumps on her before she can go too far. The monster shakes to transform
again and starts puking all over the woman before striking. In her bedroom, Charlotte hears how both
her parents are murdered. Once the noises stop, she comes out and is horrified to discover a trail
of blood, which she follows until she finds the creature in the bathroom with her mother’s body
in its back. At the barn, the men are trying to fight off the creatures to no avail. One by one
they start to get killed, and those who manage to get out are chased too as more creatures keep
arriving. The barn soon catches on fire and Thomas manages to knock over the furniture he’s tied to,
breaking the wood to free his hands. At that moment a creature finds him but before it can
attack, it gets shot down by Charlotte. Afterward the teens run out and Thomas sees the house on
fire. Charlotte explains her parents are gone, so they agree to go to Thomas’ place. Back to Joseph,
he throws a bunch of furniture into the hole, hoping to buy some time. Then he checks on his
unconscious dad and kisses his forehead before getting ready to fight. The hole in the door
suddenly opens, however it’s just Thomas and Charlotte. Joseph admits he needs Thomas’ help,
but their conversation is interrupted by Paul finally waking up. He quickly takes the medicine
and tells his sons to keep on fighting. Joseph shares his plan with the others and they gather
all the gas cans they can find in the barn while Rocco keeps on barking to alert them of incoming
danger. The group also moves an old freezer into the house. Next Thomas and Charlotte begin
reinforcing every remaining window while Joseph makes a pile of furniture and pours all the gas
on it. On top, he also adds every explosive object he could find and one of his dad’s cigarettes,
which is slowly burning down. Suddenly the pile covering the hole starts shaking at the same time
a creature comes down the chimney in the room with Paul. From the hole another monster comes out and
when it crosses a door, Thomas stabs it from behind. The creature immediately attacks back,
but Thomas retrieves his knife and stabs it in the head, actually killing it now. A third one goes
after Charlotte and she quickly shoots it down. Then the duo runs to rejoin Joseph and they begin
moving the freezer again only for the door to open behind them, revealing Paul is up and covered in
blood because he killed the chimney monster. Paul takes Charlotte’s gun and starts shooting at the
floor to hit the creatures downstairs. However the horde is huge and soon it appears in the corridor,
running towards him. Paul kicks the first one to cause some shaking, and the weight makes most
creatures fall through the floor. A few monsters still manage to stay, but the teens run to kill
them before they can hurt Paul, who is impressed by the trio’s teamwork. Afterward the three teens
and Rocco run to the freezer. Instead of following them, Paul closes the door and stays to buy them
some time. The group hides inside the freezer while Paul remembers the day he held his babies
tightly, telling them it would be ok. A new horde of creatures bursts in and Paul distracts them
until the pile of furniture finally explodes, causing the whole house to crumble and catch
on fire. The freezer starts rolling and keeps going for several minutes. When it finally stops,
the teens come out and desperately search the debris for Paul, only for a creature to suddenly
jump out. The group runs to the car and drives away as the monster chases them covered in fire.
Charlotte’s bullets don’t do anything, so when the monster is close enough, she hits it with her
gun and makes it fall apart. A few miles later, the group stops the car and looks at the stars,
which they never saw before because they were always inside at night. The next morning the
group returns to the house and decides they don’t want to rebuild the same place. After gathering
any supplies they could find, they bury all their loved ones and say a final goodbye. Afterward the
three teens and Rocco leave in the car, hoping to find a new home in the farms down the valley.