 Jazz Age singing sensation Ruth Etting (Doris Day) had looks, ambition and a haunting, smoketinged voice. It took more than that to make her a star. It took Marty  The Gimp  Snyder (James Cagney), the limping, evil-tempered Chicago hood who propelled Ruth from dingy dance halls to Broadway fame...but turned her offstage life into a nightmare of violence and fear.