An American journalist posted to London is reporting the signing of a peace treaty when he witnesses the assassination of a Dutch diplomat. Investigating the killing further, he stumbles upon an underground spy network. Alfred Hitchcock's espionage thriller, starring Joel McCrea, Laraine Day, Herbert Marshall and Edmund Gwenn.

American crime reporter John Jones is reassigned to Europe as a foreign correspondent to cover the imminent war. When he walks into the middle of an assassination and stumbles on a spy ring, he seeks help from a beautiful politician’s daughter and an urbane English journalist to uncover the truth.