Kenji opens his eyes on the bank of a river. He looks like a beggar and remembers nothing about himself except his own name. Who is he, and why does a fatal threat hang over him, tormenting him? Soon the young drifter learns something else about himself: he knows how to fight, and he does it far better than many noble warriors. This talent may save his life in an empire torn apart by hatred between powerful Houses and by demonic attacks. Joining the dangerous mission of the imperial envoy Yuma Sato, Kenji learns about the Ash King—a legendary ruler of demons who swore to wipe out the human race. The name aches in the young man’s heart… and is accompanied by alien, terrifyingly realistic visions. Now, to uncover the truth, Kenji must follow the trail of a powerful demon…