 After a shootout at the common security area at the border of the two Koreas, when two soldiers were murdered, Maj. Sophie E. Jean is assigned by the Neutral Nations Supervisory Commission to investigate the incident. The smart Major finds lack of consistency in the statements of the survivors, and in spite of being pressed by her superior, she interviews South Koreans Sgt. Lee Soo-hyeok and private Nam Sung-shik, and the North Korean Sgt. Oh Kyeong-pil, disclosing a tragic story of friendship.