The day that Pil-gi waited for so many years has finally come: hes getting his own house, the last wish of his deceased father. And what a perfect house it is! Big, beautiful, isolated, next to the ocean and at that price, Pil-gi couldn't have found a better place.

On 31 January 1968, 31 North Korean commandos infiltrated South Korea in a failed mission to assassinate President Park Chung-hee. In revenge, the South Korean military assembled a team of 31 criminals on the island of Silmido to kill Kim Il-sung for a suicide mission to redeem their honor, but was cancelled, leaving them frustrated. It is loosely based on a military uprising in the 1970s.

A forensic pathologist is about to retire in order to spend some time with his daughter. However, he is forced to continue working when his daughter is kidnapped.