Amidst numerous eerie rumors and anonymous gang warnings in Tokyo's central Ikebukuro district, there's one peculiar urban legend that stands out from the rest – the headless "Black Rider", who's known to be seen riding a jet-black motorcycle through the busy streets. Yearning for the thrill of urban life, Mikado Ryuugamine receives an invite from a childhood chum, prompting him to move to Tokyo. His wish is granted as he spots the mythical Black Rider on his first day. However, supernatural events begin to unfold, entangling regular citizens and vibrant locals of Ikebukuro in the chaos that's unfolding in their city.