Secure within a desolate home with his vigilant, protective and heavily armed parents (Joel Edgerton and Carmen Ejogo), 17-year-old Travis navigates fear, grief and paranoia amid scarce resources as a desperate young couple (Christopher Abbott and Riley Keough) seeks refuge in his family home with their young child.

Despite the best intentions of both families, panic and mistrust boil over as the horrors of the outside world creep ever closer. But they are nothing compared to the horrors within, where Travis discovers that his father’s commitment to protecting the family may cost him his soul.