Toko Kisaragi is a new female detective who was transferred to 11 Section of the 1st Investigation Division at the Tokyo Metropolitan Police Department as she wishes. Her father was a former detective of the same police department.
On March 9, a murder case was reported and the victim's body was found cemented. The next morning, the killer brazenly calls the police department and he identifies himself as Toremi. Toko Kisaragi becomes
