"Ted Healey" is hired by the Nazis to obtain top secret photos of a special anti-submarine torpedo device. His wife "Freyda" (Marta Labarr) is not impressed with her husband's duplicity, but he calms her by telling her he can get the enormous sum of £4,000 for the pictures. His would-be paymasters - led by "Beyersdorf" have others plans, though....