The Bereznik State Zoo is a camouflage for their most secret experimental research station. A spy gains access to the station and steals some top secret plans. Escaping in a jeep and pursued by the base's security forces, the spy heads for the Russian border, but his vehicle is hit by a shell and explodes seconds after the spy gets clear. The explosion traps the spy in a cave, and the World Security Council in Washington contact International Rescue for assistance. However, as political problems are not something International Rescue gets involved in, Jeff Tracy refuses to help...