Seoul, early 1970s: U.S. Army Sergeant George Sueño knows that an invasion is in the offing, and his mission is to prevent this by sneaking into North Korea and obtaining an ancient map detailing the network of secret tunnels that run underneath the DMZ. In this 8th adventure (following Mr. Kill), the keeper of the map is Doc Yong, a former lover of Sueño's who was forced to flee South Korea the year before—and she has a son. When he is captured, can Sueño rely on the enigmatic Hero Kang, his sole contact in the hostile country? Will the lovely Rhee Mi-Sook, the leader of the North Korean secret police, be too much to handle? And who are the mysterious group of women known as the Joy Brigade?