Police detective falls for singer, gets involved with gangster killing.When gangland lawyer Frank Hobart is murdered there are two suspects, Ilona Vanve , beautiful nightclub singer, and a hood named Stan , who has been hired by underworld boss Chad Bayliss to kill Hobart. Attracted to Ilona, Lt. Detective Roy Hargis tries to protect her in spite of the growing evidence against her and the pressure put on him by his assistant, Sergeant Lackey. Hargis thinks the case has broken when a dance-hall girl, Sandra Lamoreaux , who saw Stan at the scene of the murder, tries to use this information to blackmail him, and is badly beaten. She manages to talk to Hargis, and her story brings about Stan's capture and conviction for murder. But he didn't do it. It is now up to Hargis to either clear or convict Ilona.