Atmospheric wartime thriller from Lang finds English big-game hunter Thorndike (Pidgeon) making his way to Bavaria with a chance to assassinate Hitler. He's captured and tortured by the Gestapo (Sanders), escapes, and is pursued while returning to England aboard a Danish steamer. Aboard the ship Thorndike discovers his identity has been usurped by the mysterious Mr. Jones (Carradine). Befriended by a cockney prostitute (Bennett), Thorndike's plight comes down to a confrontation in a London subway tunnel.