A dolphin wanders the quiet tributaries of Tokyo. A green-haired girl carrying her father’s blade disappears into the night. A dream of a world as unkind as our own, and a story of the youth forever cast down with the burden of their forebearers. This is the world of orichalcum, the mysterious, seemingly unlimited power of the Tritons, and the world of Poseidon, whose dominion continuously extends, reaching inexorably into the heart of all living things.