Tokyo, the capital, is about to host the World Expo. Guests from all over the world were enjoying a party at the Skytree restaurant. Kazuki, Rei, Natsume, Kugayama, and other members of GOS are searching for the location of the bomb on a top-secret mission, without knowing that the Skytree bombing plan is underway. At that time, a group of armed agents attack the restaurant venue! A manned helicopter heading towards Skytree at a tremendous speed! The helicopter was loaded with bombs! Just when you think everything will be over, GOS leader Hashiba appears! But this bombing plan was just the beginning.

The mission given to Hashiba by Takahara of the Public Security Intelligence Agency was to expose the hiding place of the terrorist organization Mundo and prevent terrorism before the Tokyo Expo is held three days later. 72 hours left. Hashiba and the others notice a connection with a domestic organization from the mobile terminal of a Mundo agent secured by the public security police. It is the worst and worst criminal group that is rapidly expanding its power in the Kanto region.

Hashiba and the others get information that Vince, the leader of the terrorist organization Mundo, has left the Philippines. While the hiding place cannot be identified, the only clue is the whereabouts of Professor Oyakubukuro, a world authority on virology, who disappeared three months ago. Thinking that the key lies in Tsukuba, Hashiba and the others head to the research facility where Professor Oyakubukuro's research team is located. However, it is a fortress protected by a security system that even an ant cannot enter.

A large amount of the smallpox virus had disappeared from the research facility. Hashiba and the others find out where the terrorist organization is hiding in Japan from the professor's actions before his disappearance. Hashiba and the others attack the hideout, but Professor Oyakubukuro has already been killed. In the hideout, the existing smallpox virus has been modified and a newly cultured bioweapon, the "New Smallpox Virus"! Hashiba and his friends successfully steal the weapon, but a person appears in front of them.

Hashiba and the others have their bioweapons stolen by an intelligence agent, Zhang Kenlong, who claims to be an employee of the Chinese embassy. Meanwhile, Katsuki's wife and daughter were kidnapped by Mundo. Kazuki and the others receive a new demand, "If you want your family back, take back the weapons from China." Hashiba and Katsuki chase after Zhang Kenlong, but what do they see there?

Zhang Kianlong and others were aiming for China by sea from the fishing port of Niigata. Hashiba and Kazuki stand in front of them. Hashiba and the others are overwhelmed by the strength of Zhang Jianlong's subordinate, Liu Zihao. On the other hand, Natsume was operating a PC monitor at that time... Rei had switched sides to the Chinese side, but what was his true purpose? ――The battle over biological weapons has begun!

The bioweapon is again in Mundo's hands. The time left for Hashiba and the others was less than 9 hours. The only clue is the existence of Japanese Igawa who was with Vince. Natsume starts looking for traces of Igawa on social media, but Igawa is connected to a certain person... On the other hand, Hashiba began to suspect that there was an "informer" among the members.

Hashiba and his friends arrive at a villa following Ikawa's trail, but someone points a gun at Hashiba! Hashiba and the others confront each other with their guns pointed. There, Hashiba's unknown past is revealed. Hashiba's fate with a certain person, Kazuki's past... And finally, the true purpose of this terrorist threat is revealed.

There were less than three hours left until the terrorist attack took place. Hashiba and the others follow the transmitter attached to Ikawa and head for the enemy's hideout. However, communication is interrupted on the way, and Igawa's whereabouts are lost. At that moment, Hashiba's cell phone rings. The caller was an unexpected person. And finally, the final battle between GOS and Vince is about to begin. A man dies during a fierce firefight

Vince was aiming for the Sky Tree with a biological weapon in hand. His goal is to destroy Tokyo and transform it into a world infested with terrorism. And the other purpose is――? ! 30 minutes left until the time of the terrorist attack. A dying Hashiba chases Vince, but he finally loses sight of him. A voice reaches Hashiba's ears as he faints and collapses――