The body of a person who died an unnatural death is discovered encased in mortar like concrete in the basement of an abandoned building. Why was the person murdered this way? The next day, the investigation task force receives a phone call from the criminal who calls himself Tremi during a meeting to discuss the investigation of the case. Then, in a short time after her transfer to the First Investigative Division, Kisaragi Toko becomes the negotiator. Tremi mocks and provokes the police while offering hints regarding the murder. A second murder soon occurs just as Tremi had warned. The victim's head has been covered with concrete as they had expected. What is the criminal's motive and why is the criminal fixated with concrete? The criminal's surprising actual target soon emerges...
as Kisaragi Toko
as Takano Hideaki
as Kamiya Taichi
as Hayase Yasuyuki
as Kadowaki Hitoshi
as Tokushige Eiji
as Birukawa Keisuke
as Kamoshita
as Mochizuki
as Kisaragi Isao
as Kisaragi Atsuko
as Yaginuma Masato
as Masato's aunt
as Iki
as Yaginuma Wakako
as Kojima
as Daihen
as Yokoi
as Yaginuma Takaaki
as Masato's grandfather
as Abe Daisuke
as Izawa Yoshikuni
as Sasakubo
