At the invitation of his childhood friend Masaomi, Ryuugamine Mikado transfers from his home in the country to a school in the city of Ikebukuro. Masaomi has warned him about people he doesn't want to cross in the city: a champion fighter, an informant, a pharmaceutical company who is commissioning the abduction of women off the street, and a mysterious gang called Dollars. Nervous in the labyrinth of Ikebukuro, Mikado witnesses an urban legend on his first day in the city CELTY: a headless, black-clad motorcyclist who rides the streets with no headlights searching for its stolen head. From then on, the existence of the supernatural and a gang called the Yellow Scarves will rise to the surfaceIkebukuro will be pushed to breaking point!