A German living in India during World War II is blackmailed by the English to impersonate an SS officer on board a cargo ship leaving Japan for Germany carrying a large supply of rubber for tyres. His mission is to disable the scuttling charges so the captain cannot sink the ship if they are stopped by English warships.

The US Government tries to track down embedded Nazi agents in the States.

Broadway gamblers stumble across a plan by Nazi saboteurs to blow up an American battleship.

FBI agent Ed Renard investigates the pre-War espionage activities of the German-American Bund.

A forger is forced to work for a Nazi spy ring. His conscience gets the better of him, though, and he secretly conspires with the FBI to turn over the gang.

A police lieutenant and a patriotic professional gambler, rivals in life and love, combine efforts to corner a gang of Nazi saboteurs operating out of a barber shop, in which their mutual girlfriend works, and unmask its secret leader.