Tokyo is about to host the World Expo and international guests are partying at a Sky Tree restaurant, unaware that terrorists are planning to blow it up. GOS is on a secret mission to locate the bomb.

Takahara from the Public Security Intelligence Agency gave Hashiba and his team a 72-hour mission: to uncover the hideout of the terrorist organisation Mundo and stop a terrorist attack before the World Expo opens in three days.

Hashiba and his team find out that Vince, the leader of Mundo, has left the Philippines. Unable to find him, the only clue they have is the whereabouts of Professor Minai, a world-renowned virology expert who disappeared three months ago.

A large amount of smallpox virus has been taken from the research facility. GOS use the professor's past movements to locate the terrorist group's hideout in Japan. Hashiba and his team storm in, but Professor Minai is already dead.

Hashiba and his squad were robbed of the bioweapon by Jianlong Zhang, an agent claiming to be from the Chinese embassy, and his allies. Meanwhile, Kazuki's wife and daughter are snatched by Mundo. They receive a new demand.

Zhang Jianlong and his team head for China from a fishing port in Niigata, but Hashiba and Kazuki block their way. Hashiba and his team are crushed by the strength of Zhang Jianlong's sidekick. Meanwhile, Natsume is operating the computer screen.