The reason why Kariyama Riku was imprisoned was the collapse of the Ryujin Bridge construction site.Could that big tragedy be an “incident” deliberately planned by “the mastermind with ”unknown origins?!?

In order to prove his innocence, detective Kuroki Masaki hunted down Kariyama who escaped from prison, and finally ensured his personal safety.His real purpose is to find out the truth about the “incident” in which his brother Wakamatsu Homichi, who died during the collapse, was also an accomplice! But here, Kuroki was excluded from the search.Now the only one who can investigate the truth is himself. Thinking this way, Kariyama and Kuroki established a “secret cooperation system” and escaped again! In order to make Kariyama bear the blame, President Noritaka Isoda asked him for the truth.With a glimmer of hope, Kariyama went to the tryst place designated by Isoda...

On the other hand, Kariyama's wife Reiko, who was seriously ill, delayed hospitalization and ran around to get the innocent evidence that her husband wanted to get back even if he escaped from prison.He never dreamed that he was the one who was entrusted with the evidence, so he went to find Nagumo Daiki, Kariyama's subordinate.

Soon... things are developing rapidly every moment.Toward the core of the “extremely dangerous incident”, unexpected dots are connected——