Laura Mansfield catches a glimpse of mob hit man Jackie Wales after he shoots her businessman father. At the police station, Laura identifies Jackie as the murderer, but the policeman in charge of the case, Lt. Brewster, lets him go, citing a lack of corroborating evidence. Outraged, Laura worms her way into the unsuspecting Jackie's heart, trying to snare him and mob-connected club owner Armitage in her trap.
