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Plot
During the Korean War, scientist Dean Olmstead (Joseph Hamilton) designs a long-range radio transmitting and tracking device for the United States Air Force. During testing of the device, Capt. Tom Arnett (John Agar), leading an escort of North American F-86 Sabre jet fighters, is unable to prevent Olmstead's North American B-25 Mitchell bomber being shot down in North Korea. His commanding officer, Col. Catlett (George Cisar) plans a rescue of the scientist, whom he believes is still alive and may be undergoing interrogation by Soviet intelligence agents working with the North Koreans.
Arnett and Lt. Bill Clairborn (Gregory Walcott) are assigned to go into North Korea and bring back Olmstead. After parachuting behind enemy lines, they meet up with guerrilla leader Capt. Chon (Victor Sen Yung), who takes them to Tanya Nikova (Audrey Totter), a Russian nurse, who has been working as a spy for the guerrillas. Tanya had previously been romantically involved with Arnett, but proves invaluable to the mission. She knows that the scientist may be under care of her boss, Col. Kuban (Robert Carricart), a Russian doctor. After they discover Olmstead's whereabouts and bring him out of the prison camp where he was being treated for a concussion, the group is pursued by North Korean Maj. Wan (Leonard Strong). Tanya is wounded during the escape but manages to drive the Americans to an airfield. She dies, but the two American pilots and the scientist make good their escape in a pair of North Korean MiG-15 jet fighters. However Clairborn deliberately crashes his plane into a attacking Korean fighter being unable to discover how to fire the Mig's guns.