Newlyweds Helen and Paul are honeymooning in a Texas cabin when Paul is murdered by an unseen assailant. Fleeing into the woods, Helen is taken in by Odie Pickett and his impoverished hillbilly family, becoming trapped in their isolated shack while the killer is still on the loose and wreaking havoc.

A young psychiatric nurse goes to work at a lonesome asylum following a murder. There, she experiences varying degrees of torment from the patients.

The last seven survivors of a nuclear war barricade themselves against the outside world. Beyond a dense mist, other survivors, radiated and mutant, grow hungry.