Just out of jail and vowing to go straight, gentleman crook Boston Blackie (played by Raymond Glenn) undertakes the reformation of a pretty blonde (played by Corliss Palmer), who has stolen a necklace from a cabaret dancer (played by Rosemary Cooper). When he learns that the jewels belong to the girl's philandering father, Boston Blackie saves the day by performing one last job: replacing the necklace in its owner's safe.