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.

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.

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.

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

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.