People throughout the city speak of an urban legend known as the “Headless Rider”. A surprising number of people have personally witnessed it speeding down the streets on a jet-black motorbike with no license plate.

After losing contact with her brother Seiji, Namie Yagiri enlists Izaya's help to find him. While roaming through Ikebukuro, Seiji and Mika Harima stumble onto Shizuo and Celty and a heated pursuit begins after Celty figures that the head attached to Mika's body is actually hers.