"Yeah, we know you're an information broker or something. But don't you think you're a little too conspicuous for your own good, Orihara Izaya-san? - But then, it's not like you're ever going back to that job again - " Ikebukuro, Tokyo. The teenagers, entangled in their twisted friendship, fight against destiny while Orihara Izaya receives a request. The information broker has remained active behind the scenes despite being on the wanted lists of several organizations. But this time, he is finally imprisoned. The devil's claws even threaten to reach his twin sisters... What is the truth the information broker finds out as he sneers without a fear in the world? What happened in Izaya's past? And meanwhile, what about the Headless Rider - !?