A young attorney, Larry Condon, is on a retainer by a nightclub-owning gangster, to carry and deliver what he thinks are legal papers but he is innocently carrying around millions of dollars in stolen bonds. He meets Helen Griffith when she is arrested in a raid on a gambling house and befriends her. She talks him into taking her to the nightclub of the man he is working for and, while there and unobserved by anyone by Larry, he sees her going through the files and desk of the owner. Who is this mystery woman he just got released from jail, and what is she up to?