Riku Kariyama, the civil design director of Teiwa Construction, a large construction company who is passionate about bridge construction, is engaged in major projects that the Tokyo Metropolitan Government is devoted to.In order to build the Dragon God Bridge, which carries the dreams of countless people, he spent several years fighting every day.But one day, at the construction site of the Ryujin Bridge, an accident occurred involving many people!

Why on earth did such a tragedy happen?While Kariyama, who was trying his best to design the bridge, was speechless, the situation began to develop in an even more unexpected direction.Detective Masaaki Kuroki of the Metropolitan Police Department's Investigation Section 1 began the investigation with astonishing obsession in order to pursue the truth of the mysterious accident.In addition, Kariyama and his wife Reiko, a couple who are separated by missing each other, will also face an unimaginable and ruthless fate...!

There are “something” of unknown origin ready to move everywhere, and Karishan is swallowed up by the turbulent whirlpool.In that way, he found the path of hope and rebirth, and where did he end up...!?