World War Two is over and the Cold War beginning when Brett Manning is sent to do some business in Archangel. But on his way, in the thick fog and darkness of the Barents Sea, disaster strikes and his ship is run down by a much larger vessel. Only Brett and one other man are picked up. The two survivors find themselves on board a Russian freighter bound for a secret destination. Slowly it dawns on Brett and his companion that they now know too much for their own good. They can never be allowed to carry away the information that has come into their posession. Their only hope lies in escape. But how does one escape from a ship at sea?