The world reaches out to the forbidden peace (system). 2116. It has been about 4 years since Akane Tsunemori was assigned to the Criminal Division of the Public Security Bureau of the Ministry of Health, Labor and Welfare. The Japanese government has finally begun to export the Sibilla System and Doron to the world. Han, the chairman of SEAUn (Southeast Asian Union), which has been in a state of civil war for a long time, has adopted the Sibilla System in the capital Shambhala Float. Shambhala Float, a floating city that was once the center of the conflict zone with bullets flying, has successfully achieved peace in an instant. It seems that the experiment of the Sibilla System has achieved beautiful results. At this time, Japan is invaded by heavily armed stowaways. They are well aware of Japan's security system and evade the surveillance of the Sibilla System to carry out terrorist acts. In order to deal with this unprecedented stowaway incident since the implementation of the Sibilla System, the supervisor Akane Tsunemori led the Public Security Bureau Criminal Division 1 to confront the stowaways. Not long after, the person who is suspected of leading these terrorists to invade surfaced. This person is a man who used to be the executive officer of the Public Security Bureau Criminal Division 1 and was also Akane Tsunemori's former colleague. Zhu went to Shambhala Flot alone to search. To know the true intentions of the man he once believed in. To see the justice that this man believed in.