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 Koichi Tokiwa of the Ministry of Economy, Trade, and Industry are members of that conference.
One day, Yusuke Tadokoro’s article is published in a weekly magazine. His articles warns that Kanto region will sink into the sea. Due to his article, groups begin to hold protests. To ease the situation, Keishi Amami meets with Yusuke Tadokoro, but Yusuke Tadokoro insists that in the near future, Izu Peninsula will sink and that will portend the Kanto region sinking. Around this time, Minori Shiina, who is a weekly magazine reporter, talks to Keishi Amami about possible corruption between a company and the Ministry of Environment. Keishi Amami is uncomfortable dealing with everything, but he takes part in his hobby and goes scuba diving with Koichi Tokiwa. There he faces a shocking event.