 In Los Angeles, when the singer Mavis Marlowe (Constance Dowling) is found dead in her apartment, Kirk Bennett (John Phillips) is accused for the murder, since he had been blackmailed by the victim. Kirk s wife Catherine Bennett (June Vincent) believes her husband is innocent and joins to Martin Blair (Dan Duryea), the alcoholic former husband of Mavis, to investigate the crime and try to find the killer. They suspect of Marko (Peter Lorre), the owner of a night-club that was seen in Mavis  place in the night she was murdered, and they try to prove his possible guilty.