In the underworld of Manhattan, a woman dares to stand up to one of the city's most powerful gangsters.
Johnnie learns crime from petty thug Frank Wilson. When Wilson kills a pawnbroker with a gun stolen from Johnnie's sister Madge's fiance Fred Burke, Fred goes to Sing Sing's death house. Wilson uses all the pressure can to keep Johnnie silent, even after he and Johnnie themselves wind up in the big house.
Canadian Mountie Steve Wagner captures a German Luftwaffe officer on a spy mission, who later escapes from the prison camp. To catch the spy ring, the Mounties employ a ruse so that the spies, believing Steve to be sympathetic, enlist him in their plans.
