It has been four years since Pai, a young girl born from a race of powerful creatures, disappeared without a trace. For Yakumo, Pai's love and Wu, reuniting with her is bittersweet -- for she has amnesia, and has no memory of her past. Now, with many enemies rising against them, Yakumo and Pai must strive to unlock the spell which seals her memory, so that she can defeat the evil Benares once and for all.
It is believed that to consume the flesh of a mermaid, means that you will never show signs of age, and live forever. However, many cannot handle its taste and become demons for eternity. Towa is a woman whose thirst for this flesh consumes her, as she was made only partially immortal by drinking the blood of a mermaid years ago. Unable to cast her demons aside, she destroys everything in her path on a search for this legend.