Near the end of the Korean War, a platoon of U.S. soldiers is captured by communists and brainwashed. Following the war, the platoon is returned home, and Sergeant Raymond Shaw is lauded as a hero by the rest of his platoon. However, the platoon commander, Captain Bennett Marco, finds himself plagued by strange nightmares and soon races to uncover a terrible plot.

Set two years after the drama series "Nemesis," Naoki Kazama works for Nemesis Detective Agency and is regarded as a brilliant detective. He is able to solve the most difficult of cases, but he has a secret. He is actually a lousy detective and relies on the genius skills of his assistant Anna Mikami to solve cases. Their partnership continues.

A man awakens from a two-month-long coma. Total amnesia. A bullet fired point blank. He doesn't remember anything. He's told that he had a wife and a son. They've been killed. He's revealed his past identity by the Colonel, who insists they are best friends. He's a Major of the Military Security Agency. An inspector from the State Security Agency appears affirming that he has information on people responsible for the massacre of his family. The Major is discharged from the hospital. He tries to patch together a normal life but is confronted with emptiness and despair. His only chance of discovering his identity and the assassin of his family is to accept the game that the Inspector has set up for him with the Businessman, the Mafioso and the Politician. He agrees... Discovers that he was a war criminal... Realizes who took a shot at him... Finds out who killed his family... Discovers the Fourth Man!