Celestin, a god who had been imprisoned on the moon for treason against the kingdom of Yggdrasil, had been confined for countless centuries until Morgan Le Fey, a fairy, set him free. Celestin then made his way to Earth to reconnect with his ex-student, the goddess Belldandy. However, the scenario deviated as he wiped out Belldandy's recollection of her significant other, Keiichi, and manipulated her to cause chaos in Yggdrasil and on Earth.