Long before the first shots of WWII were fired, the FBI was already locked in a high-stakes battle against a German espionage ring operating on American soil. This episode details the investigation into Guenther Rumrich and his handlers, who plotted to steal military secrets and kidnap a high-ranking U.S. colonel. Discover how this landmark case shattered American neutrality and forced J. Edgar Hoover’s Bureau to evolve into a modern counterintelligence powerhouse.