High school students Tobio, Maru, Isami, and 20-year-old Paisen, who graduated from high school a long time ago are contented with their lives. One day their ordinary routine completely changes. Tobio and the rest plant a home-made bomb at the school next door in revenge for Maru’s vicious beating at the hands of delinquents. However, the bomb which was only intended to shock the delinquents, ends up causing a huge explosion that claims many victims including friends and seniors. This triggers the start of their life on the run.
Toyama Kinshiro is a 30-year-old newly-appointed police chief at Kitamachi Police Station who firmly believes his mission as a policeman is to listen to every voice of innocent citizens and protect the peace in the community. He comes off as aloof and a bit quirky at first, but in fact he has brilliant investigative instincts and spots clues that no one else can detect. Unlike his elite career bureaucrat colleagues, Kinshiro doesn't dress or act like a stereotypical Chief Police. Rather than sitting behind a desk, Kinshiro leaves the office and literally goes around town to do the investigation work, and go the extra mile to solve any crime regardless how small or trivial. However, his unorthodox approach generates a lot of antagonism from his subordinates at Kitamachi Police Station.