In Missouri, the forensic psychiatrist Cara Jessup rejects the theory of dissociated or multiple personalities and the prisoner of the death row Joseph Kinkirk has no remission from the governor and is sent to lethal injection. Cara is a widow that raises her daughter Sammy with the support of her brother, Stephen Harding, and Catholic that believes in God. Her father, Dr. Harding, invites Cara to interview the patient David Bernburg, who is a sweet man. Out of the blue, David impersonates the...

A young man, named Ash, takes his girlfriend Linda to a secluded cabin in the woods where he plays back a professor's tape recorded recitation of passages from the Book of the Dead. The spell calls up an evil force from the woods which turns Linda into a monstrous Deadite, and threatens to do the same to Ash. When the professor's daughter and her entourage show up at the cabin, the night turns into a non-stop, grotesquely comic battle with chainsaw and shotgun on one side, demon horde and flying...