Onslaught

The film opens with former army sniper Celeste (Adria Arjona) practicing shooting on some pumpkins outside her trailer. Her arms tenses and shakes up until she cuts a bruise on her arm slightly with her ring. This helps her get her shot straight.

Elsewhere, Dr. Hans Kammler (Dan Stevens) and his wife Hanna (Rebecca Hall) are getting ready for the day after some weird foreplay. Hans leaves on a chopper to go to his laboratory while Hanna watches.

Celeste’s ex Griffin (Jacob Scipio) brings their daughter Daisy (Blake Kennedy) over to the trailer park. Daisy goes inside while Griffin talks to Celeste and tells her that he is moving to a different state with Daisy. Celeste chews him out for trying to separate her from her daughter. Other people living in the trailer park include Celeste’s neighbors Josiah (Reginald VelJohnson) and Kovacks (Eric Wareheim).

Hans and his colleagues are doing tests on three male subjects. A man named Baylor (Michael Biehn) arrives to observe the experiment on behalf of an unknown organization. Hans shows Baylor the three men, who are former army soldiers. The first is called “Crybaby” (Tyler Hall), nicknamed by his fellow troops for weeping after killing 17 civilians. The second is “Cockroach” (Dave Campbell), named after taking an insane amount of gunshots and surviving. The last is “The Butcher” (Alex Pereira), a former combat instructor who used a cleaver to take out a whole squad.

Hans demonstrates the men’s abilities by gassing them and putting them in a room with another squad. The experimented soldiers brutally slaughter the other team, which Baylor is disgusted by. The men then appear to each fall into cardiac arrest. Hans and the other doctors go to inspect, only for the men to revive and shoot all of them, including Baylor. Hans raises a knife to the men, declaring “it is done”, before The Butcher empties a gun into Hans. The three maniacs then leave the facility.

Celeste takes Daisy to a gas station to get food and snacks. While sitting in the truck, Daisy sees Crybaby, Cockroach, and The Butcher in the distance, but they are gone before Celeste returns. After they drive off, the three brutes enter the gas station and shoot everybody there.

An agent named Cyrus (Drew Starkey) is contacted after the incident, and he must drive down to the scenes of the trio’s crimes. He meets an officer named Larkin (Leon M. Brown) at the fiery remains of Hans’s lab, learning he was behind all of this after previously having been believed to be dead when his crimes were already made known. Cyrus and Larkin then head down to the gas station. Cyrus gets in touch with Hanna, who says that the three men are meant to be “super soldiers” created by Hans to be deployed against the domestic populace as ideal combatants who only know war and violence. She orders Cyrus not to engage them, but to observe what they do and cover their tracks. Cyrus and Larkin find one man in the back who survived the trio’s gunfire, only for Cyrus to execute him to keep him quiet.

The super soldiers arrive at the trailer park. The Butcher slaughters one man doing laundry while Cockroach blasts another guy trying to grill some burgers. Celeste hears the gunfire and goes to hide Daisy. She goes to grab her gun and gets ready when Crybaby tries to break through her home with a chainsaw. Celeste gets her eye shot out and wears a patch around it. She gets Daisy out of the trailer and heads to Josiah’s home. They also get help from Kovacks, whose car has a radio to call for help.

Kovacks runs toward his car, with Crybaby following with the chainsaw. Celeste gets one of Josiah’s rifles and snipes Crybaby in the head, causing him to land on the chainsaw and get shredded. Kovacks radios for help and goes to get Celeste and Daisy while Josiah loses consciousness after being shot. Cockroach stabs Kovacks repeatedly, but he drives and crashes his car, sending Cockroach through the windshield and killing him.

Daisy makes a run for it, and The Butcher chases her as she crawls under a trailer. Once she escapes, Celeste emerges with the chainsaw and prepares to fight The Butcher. He reveals his face to her, as he was originally part of her infantry and lost a fight to her (she kicked him in the balls), and she believed he was dead. Celeste charges toward The Butcher as he grabs an axe and a dagger, but she slices off his leg and then jams the chainsaw into his chest, killing him.

In the morning, Cyrus and other government goons show up, while Josiah wakes up from his wound. Cyrus tells Celeste that she and Daisy can be relocated and must never breathe a word about what happened that night. Hanna considers the project to be a success. Celeste tells Daisy she could use a change of scenery.