Synopsis: When an Allied prisoner of war ship transporting a cargo of German prisoners is torpedoed by a German submarine in the North Atlantic, three survivors cling for their lives to a raft. The three are German prisoners of war Corporal Karl Richter, Private Heinrich Krause and British interpreter Roland Cheever. Cheever, who was wounded in the explosion, is vulnerable and defenseless, and so the predatory Richter decides to assume his identity.