Safe-cracker Ned Dugan agrees to perform one last robbery, earning him enough money to move his younger brother, Jimmy, out of the city. At the behest of a crooked politician, Ned attempts to steal valuable papers from the home of Mary Callahan, who, coincidentally, is caring for the injured Jimmy. Mary catches Ned in the act, but she refrains from calling the police. Ned repays Mary by abandoning his life of crime, undermining the politician, getting her father out of jail, and saving her impressionable brother from a blackmailer.