In order to help bring Nazis to justice, U.S. government agent T.R. Devlin recruits Alicia Huberman, the American daughter of a convicted German war criminal, as a spy. As they begin to fall for one another, Alicia is instructed to win the affections of Alexander Sebastian, a Nazi hiding out in Brazil. When Sebastian becomes serious about his relationship with Alicia, the stakes get higher, and Devlin must watch her slip further undercover.

John Wayne stars as U.S. Air Force aviator Jim Shannon, who’s tasked with escorting a Soviet pilot (Janet Leigh) claiming — at the height of the Cold War — that she wants to defect. After falling in love with and wedding the fetching flyer, Shannon learns from his superiors that she’s a spy on a mission to extract military secrets. To save his new wife from prison and deportation, Shannon devises a risky plan in this 1957 drama.