After a fierce battle against the Yōkai of the underworld, Yomi,
the demon huntress Ayako, loses her memory. She finds herself trapped
in a life that feels wrong. A world she knows she doesn't belong in. Supported by her lost love, Yumi, and the enigmatic ancient demon Rin,
with a mysterious agenda of its own, Ayako searches for the truth. But every memory recovered strengthens her enemies.

Together, they embark on a journey to recover Ayako’s lost past
and prepare for the inevitable day they must face
the darkness of Yomi once again.