This is one of schlock producer Bert I Gordon's best films. After watching her mother Jessica (Zsa Zsa Gabor) die in a mysterious fire, young Susan Shelley (Susan Gordon) is sent to a convent/mental hospital where she remains for three years. In the meantime, her father Edward (Don Ameche) has married Susan's former governess, Francene (Martha Hyer) who is also his former mistress. After Susan's release from the hospital, she returns with her father and stepmother to the family estate. Immediately, the familiar surroundings bring back visions of her dead mother, as well as a gnawing suspicion that it was she herself who is responsible for her mother's death. Meanwhile, the money-hungry Francene, who has exhausted her husband's share of his late wife's bequest, begins a campaign to return Susan to the hospital for good--thereby gaining the half million dollar inheritance held in trust for her. Enlisting the help of Susan's cousin Anthony (British actor Maxwell Reed and former husband of Joan Collins), Francene also seeks to learn the whereabouts of a magnificent diamond necklace she is sure Susan has hidden. An atmospheric production, filmed at the old Doheny estate in Beverly Hills, the scene of many subsequent films, an attractive musical score by Robert Drasnin, and fine acting by all (including Miss Gordon, the director's daughter) give this murder mystery spice. And the beautiful Martha Hyer gives it class. Look for screen veterans Signe Hasso (as a nun) Wendell Corey (as the family lawyer) and Anna Lee (as a friend of Jessica). A very good novelization of the screenplay was written by screenwriter Robert Sherman. Incidentally, the pressbook synopsis has a different ending!