While attempting to free the final guardian, Suzaku, Hikaru is betrayed by the evil spirit Tsukuyomi, who possesses Amaterasu. Following the battle, Hikaru learns the shocking truth of his heritage: he is the son of Izanami and the brother of the antagonist Susanoo. With the revelation that Miyuki is not his biological sister but a destined servant, Hikaru must now embrace his divine lineage to save his mother and bring peace to the realm of dead souls.