Warner Bros. Continued it's one-studio war against Hitler and his minions by following the sensational Confessions of a Nazi Spy with this crackling dramatic thriller starring Joel McCrea and new discovery Brenda Marshall. McCrea plays U.S. State Department diplomat Barry Corvall, who becomes a one-man counterspy agency in the dawning days of World War II. After Barry discovers that his new bride, refugee Brenda Ballard (Marshall), has been coerced into acting as an agent for Nazi Germany, he is expelled from the Foreign Service. Recruited by an Assistant Secretary of State, Barry goes undercover as a disgraced ex-diplomat, besotted by his Mata Hari wife. Journeying to Geneva, Barry and Brenda put themselves in harm's way in a desperate bid to uncover the secrets of the Nazi spy ring operating inside the United States. While Brenda continues to pose as a spy, Barry finds the proof he needs. This action-romance pulls no punches.