A newly-married young woman is possessed by the evil spirit of her husband's deceased first wife. The possession turns her into a scheming killer who will stop at nothing to get what she wants.

When Kate Hazleton visits her sister Miranda (Mandy) and her husband Dick Anthony, Dick tells her of his concern over Mandy's recent strange, moody behavior. Walking along the beach that night, Miranda hears strange voices, and when she returns home, she becomes hysterical and falls into a coma. When she recovers, she is hostile and claims she is Felicia and not Miranda. Dick tells Kate that Felicia was his first wife, who died in a plunge from a cliff. Miranda asks to see the Bradleys, Felicia's parents, and when she calls Ada Bradley "Mother", Dick and Kate realize that she is possessed by "the other one." Ada Bradley has been practicing black magic for six years and believes that it is responsible for returning her dead daughter to her. Mr. Bradley, as one would expect, is horrified at both revelations, although the first one indicates he wasn't paying much attention to what his wife was doing when she was puttering around the kitchen the past few years. That night, "Felicia" tries to kill Kate by flooding her room with gas, but Kate awakens in time. Both of the Bradleys suffer strokes--long odds, not impossible--that night and the old man dies while Ada is left paralyzed. The desperate "Felicia" seeks out Maitre Renall, also a black practitioner but on a grander scale than Ada Bradley, as the only person that can keep her alive. He promises to do so but only if she will make a blood sacrifice of an innocent victim. Nancy Corodell, jealous of Renall's attention to "Felicia", hears this and Renall's black magic gets tested by the hell-hath-no-fury method.—Les Adams <[email protected]>