• In the midst of a peaceful spring day, central Tokyo was engulfed in flames and the gates to hell were thrown open. Now, 3 years later, the city's outlying districts live in fear as strange incidents frequent the news; rumors of terrifying "beasts" run rampant; and the ominous presence of Tokyo's ruined center, the "Lost Zone" looms. A young girl is attacked by a rampaging demon while on her way home, but is saved by another demon wreathed in a shadow-like flame, who reveals himself to be a young man named Takeo Ishihara. Who is this mysterious youth; what is the demonic power he wields; and what is his mysterious connection to the demon's origins?