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 – Dullahan: 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 surface… Ikebukuro will be pushed to breaking point!