Seoul, early 1970s: US Army Sergeant George Sueo is on a mission of extreme importance to the South Korean government, as well as the US Army. Kim Il-Sung has vowed to reunite North and South Korea into one country before he hands control of the government over to his son, which means North Korea is planning to cross the DMZ and overpower the American-allied South Korean government. Sueo's mission is to obtain an ancient map of the secret tunnels that run underneath the DMZ. To do so, he will have to infiltrate the North Korean Communist inner sanctum.