Investigator Yonezawa is searching images from the Tokyo Big City Marathon, targeted for a terrorist bomb attack. Within the images he sees his former wife Kazuko, and the following day he learns that dead body that looks like her has been discovered.

Detective Kenichi Itami from the The National Police Agency and Akira Iwatsuki from the cyber investigation team investigate a complex murder case. The victim was under investigation by the cyber investigation team. As Detective Kenichi Itami and Akira Iwatsuki delve deeper into the case, pressure from around makes their investigation even more difficult. Secretly, a national financial doomsday scenario is carried out under the plan of "X Day".

A former TV presenter is murdered. On the same day, two police officers from the Metropolitan police Special Mission Task Force, Sugishita Ukyo (Yutaka Mizutani) and Kameyama Kaoru (Yasufumi Terawaki), are guarding a female Diet member, Katayama Hinako (Yoshino Kimura). The pair identifies explosives and saves her life. From the clues left at the scene, Sugishita builds up his case and finds a connection between the murder of the TV presenter and the attempted murder of the Diet member. During a painstaking investigation, the savage murder case of a young overseas volunteer five years earlier emerges in the background, and the pair prevents indiscriminate murder at the Tokyo Big City Marathon event by suppressing the perpetrator.