The burned remains of a young woman discovered in Shinjuku, Tokyo. The police comes to the conclusion that its the work of a pyromaniacal serial murderer. The murder victim is identified as Mayumi Tamaki, a native of Ishigaki, Okinawa. As the investigation unfolded, her former boyfriend, a former rider of a motorcycle named Chōei Mikawa emerged as a suspect. But Kano did not agree Mikawa is the suspect. Kano started conducting the investigation himself to search the real criminal person.