A U.S. bomber crashes behind the Iron Curtain. Its Fail-Safe device, however, failed to self destruct. A brilliant U.S. scientist who defected to the unnamed country is supervising efforts to take the device apart, which will yield valuable information about the entire U.S. defense system. The IMF must recover the Fail-Safe device and abduct the scientist. As part of the plan devised by Phelps, Rollin and Cinnamon will pose as U.S. scientists on a tour.