An angel's face with a devil's heart is psycho rich girl Diane (Simmons), who wants to get rid of her hated stepmommy (O'Neil) so she can have daddy (Marshall) all to herself. Diane is infatuated with new chauffeur Frank (Mitchum) and he becomes an unwitting accomplice in her deadly scheme. Both are brought up on murder charges but Frank doesn't realize how far this crazy chick will go to keep what--and who--she wants. Wild noir melodrama from Preminger that gave good girl Simmons a chance to unleash her inner bad femme. Mitchum is his usual cool self.