Ever since the Devil Quake, the battles for the soul of Shinjuku have never ceased deep within the shadows of the city. On one side of the conflict, the Aki clan: Renjo Aki and his son Setsura. On the other, the Roran clan: Byori Roran and son Gento. Along with their supernatural servant, Hyota.
Defeated by Renjo, Byori vowed to bring himself back to life in fifteen years after placing his own severed head on the coffin lid like a guardian angel. Hyota buried the accursed coffin containing his son deep within the earth.
Those fifteen years have passed. Setsura Aki now owns a senbei shop in West Shinjuku and moonlights as a P.I. One day, a squad of yakuza assassins comes after him, leaving him no choice but to dispatch them with his devil wires. Setsura knows that something is afoot. Gento has awoken from his long hibernation.
After a decade and a half, their conflict picks up where it left off. Equally alarming, Gento’s skills with his own devil wires have grown to match Setsura’s.
Gento makes Setsura an offer he can’t refuse: join forces and seek out the seal. A startling proposition that would shape their destinies and put the true nature of Demon City in a harsh new light.
But Setsura does refuse. At the same time, Mephisto, the Demon Physician, is seeing a new patient. The men who’ve had sex with her have all died strange deaths. As it turns out, Mayumi is the seal they seek.
No sooner has Setsura figured this out but Mayumi is kidnapped by a biker gang. She is subsequently made the prize in the Coliseum Death Match, where Shinjuku’s most skilled killers strut their stuff and rank their abilities.
Setsura heads there at top speed, Gento a step ahead of him. He’s already discerned Mayumi’s true nature for himself.