A young man who showed little promise while a high school student becomes a master detective, just like his grandfather.

Living in Ikebukuro — an area infamous for juvenile crime, 21-year-old Makoto Majima becomes associated with a youth gang called the G-Boys. A troubleshooter known for his cool headedness and ability to get things done, Makoto diffuses tense situations around Ikebukuro to keep his friends and others out of harm's way. However, the mysterious death of his girlfriend and an escalating gang turf war threaten to be more than Makoto can handle.

A hard-boiled film that follows a detective who will be killed the next morning should he fail his mission, the yakuza assigned to watch over him, and the friendship that develops as they work together.