AllMovie

High above Tokyo's Shinjuku area, two men battle for the fate of the world: Rebi Ra, an emissary for the demon world, and Genichiro, the only man who can stop him. It's only barely a contest, and the human champion falls as his mystical sword is hurled deep underground and Shinjuku is remade as a literal hell on Earth. Ten years later, Kyoya, the man's son, watches in horror as the Federation president is struck down by one of Rebi Ra's minions on live television. Later that evening, as he trains halfheartedly with his own mystic blade, he is visited by the apparation of an old man named Master Rai, who reveals how his father died and exhorts him to go into Shinjuku to fight Rebi Ra before he can extend his reach to the rest of the world, paving the way for a demon invasion. Faced with Kyoya's reluctance, Master Rai sends Sayaka, the Federation president's daughter, to convince him to save her father and the world. Kyoya refuses to enter the city -- until Sayaka heads there on her own, forcing him to go after her.