A young husband comes home only to discover her second wife has been having an affair behind his back with her own sister's boyfriend. David Starrling has entrusted his young daughter, Susan, by a previous marriage to Celia, a beautiful and sophisticated woman, who is more preoccupied in two timing the absent husband than caring for the girl. Into this picture enters Dell, Celia's own sibling, who discovers how her own sister has been deceiving her.
One night, after Dell has visited David and Celia, she returns to confront her sister. Unknown to her, Celia has been having a fight with David because, he too, has told her all that he has seen and the way he has caught her lying. After heated words are exchanged, a gun goes off and Celia lies dead on the floor. Susan, who evidently has seen it all from a side door, begins screaming hysterically.
David is accused of the murder of his wife and is found guilty. He receives the death penalty and is sent away to await the date of his execution. Susan's trauma lands her in a children's hospital, where the kind Dr. Caroline Canford, a specialist in psychological disorders is working with the girl to restore her mental balance. Dell, who has a lot at stake wants to get rid of Susan so that she can put behind this unhappy time she has been living. When she gets custody of the girl, wants her to come stay in her country place, Susan, who has suffered a great deal, suddenly sees a familiar shadow projected on the wall and screams for help, as the mystery is solved.
Pat Jackson, a British director, got an fine screen play from William Ludwig, which he turned into a satisfying thriller. He got helped along the way by the interesting music score Andre Previn composed and the cinematography by Ray June, with its dark shadows. The movie holds the viewer in a certain suspense, even when the culprit is known from the start.
Ann Sothern, who for some reason bears an uncanny resemblance of Agnes Moorehead in this film, has some good dramatic moments; she makes the best out of them. Sweet Gigi Perreau is seen as Susan, the girl at the center of all the intrigue. Nancy Davis, who went to be the First Lady of the land, makes an impact as Caroline Canford, the doctor that is able to untangle everything in the young girl's mind. Zachary Scott is only seen briefly. The rest of the players make a valuable contribution to make this picture worth seeing.