Based on the light novel series of the same name, the series follows an eccentric group of citizens residing in Ikebukuro who form various connections through dealings with the local gangs - one of which is the "Dollars," a so-called invisible gang which no one seems to know much about. On top of all of this, the city is enraptured by the urban legend of the "Black Rider," the supposedly headless pilot of a black motorcycle.

Reads from right to left. Drrr!! is an abbreviation of Durarara!!