Kate Bowman (Jocelin Donahue) is an average social worker who, after the sudden death of her twin sister, is investigating the mysterious deaths of other people who died in their sleep. Shortly before their deaths, the victims all reported a supernatural force that appeared to them while they were suffering from sleep paralysis. When Kate investigates further into the case, she opens herself up to the creature's wrath and soon finds herself and her family suffering from an ancient evil.

A group of survivors from all walks of the apocalypse – an idiotic Sheriff with definite coma-induced brain damage, his hardass son and a hobo with only a crossbow to stave off the walking dead, four squabbling friends forced to survive this zombieland together, and a lonely zombie who just needs love to fully regain his warm body – leave their once-safe mall hideout in search of the rumored Safe Haven Ranch, a refuge untouched by the zombie virus that has ravaged humanity.