Four student filmmakers set out to explore an abandoned building famous for its connection with the occult, but as their journey becomes littered with strange behavior and unexplained phenomena, it becomes clear the horror they are attempting to document may already be lurking among them.

Based on real events, the story follows a father and son (Offerman and Tremblay) who identify as Sovereign Citizens, a group of anti-government extremists, as they venture across the country and find themselves in a standoff with a chief of police (Dennis Quaid) that sets off an intense manhunt with tragic consequences.