After alien spacecraft appear, a deadly mucus-borne disease begins spreading rapidly among humans, turning them into violent "campers." A group of survivors hole up in a farmhouse, including medic Margie who believes there may be answers at a nearby mobile lab. When a diseased soldier finds them with a map to the lab, Margie along with a fellow survivalist embark to find it.
But things go from bad to worse when one of their fellow survivors at the farmhouse becomes infected with the alien virus. Now they're faced with unavoidable decisions. Can they wait for the others to return from the lab (if they ever do) in hopes of saving him, or should they kill him to avoid infecting the others? Whatever the decision, they must act fast as the sickness is taking over more quickly than they realize. With shady characters afoot and mutated humans on the hunt, the group must bond together to make tough decisions for themselves and each other.
Although the film centers on a small group of people, the story ends on a much bigger picture. Our heroes live in a complex apocalyptic world with a rich history, full of survivalist desperation and treachery. Each character has a fully developed and unique origin story. By the end of the film, we can’t help but wonder where these characters will go, who else they might find, and how they will defeat the humans-turned aliens in this desolate wasteland.