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Scientist David Sparrow, developer of a code machine, is captured and held behind the Iron Curtain.
U.S. Secret Agent Robert Hatfield attempts to break a Russian ring which is smuggling narcotics into a Middle Eastern port.
Attempting to break up a Communist spy ring in Alaska, Captain John Rand enters the penitentiary as a prisoner to become friendly with a Red agent, help him to escape in the hope that he will lead Rand to other members of the ring.