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In 2023 in Tokyo, Prime Minister Eiichi Higashiyama pushes for COMS at the World Environment Conference. COMS is a method to liquify pollutants and store it in the crack of the sea floor. Prime Minister Eiichi Higashiyama gathers young and talented bureaucrats and launches Japan Future Promotion Conference, which is to benefit the future of Japan. Keishi Amami of the Ministry of the Environment and Kōichi Tokiwa of the Ministry of Economy, Trade, and Industry are members of that conference.

Following the sinking of Hinojima, the prime minister dismisses Tadokoro's theory as baseless. A magazine article jeopardizes Amami's career.

After the deputy prime minister refuses to believe Tadokoro's shocking prediction, Amami attempts to convince a renowned scientist to review the data.

News of Kanto’s possible sinking is suddenly made public, causing panic among its residents and a halt in trading. Amami proposes an evacuation plan.

The Kanto region suffers enormous casualties. When Amami learns the bus his daughter is on is caught in a tunnel accident, he sets out to find her.