A vengeful witch and her fiendish servant return from the grave and begin a bloody campaign to possess the body of the witch’s beautiful look-alike descendant. Only the girl’s brother and a handsome doctor stand in her way.

A writer accepts a bet that he cannot spend the night alone in a haunted castle on All Soul’s Eve. Once night falls at the castle, several who had been murdered therein return to life, reliving their deaths and seeking to kill the writer for his blood in a vain attempt to stay alive beyond that one night. Barbara Steele, as one of the living dead, tries to aid his escape from the castle.