The body of Kikumura, the attacker who was supposed to have been killed by Himuro, Tamura, and Kawatani, has disappeared. Himuro and his friends learn from arms dealer Jimmy Ogata that the guns the attackers had were made in China, and they suspect that there are remnants of the semi-grey group "Cobra." Then, he ends up looking for Kikumura, who was supposed to be dead...