South Korean President Han Kyeong-jae, played by Jung Woo-sung, participates in the historic meeting with U.S. President Smoot (Angus Macfadyen), whose first name isn't given, and North Korean leader Cho Son-sa (Yoo Yeon-seok). His job is simply to mediate the two obstinate leaders, who don't want to be outdone by the other.
On the verge of the breakdown of the peace talks, a North Korean general (Kwak Do-won), who strongly opposes Cho's appeasement policy, stages a coup and kidnaps the three leaders in a cabin of a nuclear-powered submarine.
In the small compartment, the second round of the tripartite summit begins. Smoot and Cho blame each other on the current touch-and-go situation on the Korean Peninsula, while the South Korean president tries to prevent the situation from getting out of hand.
At the same time, the kidnapping of the leaders of three nations disrupts the power balance in East Asia, and the U.S., China, Japan and the two Koreas bring their strategic weapons to the East Sea.