In a world divided by the eternal war between the Goddess Clan and the Demon Clan, Sera was born - a being who was never meant to exist. Raised by Mael and Zeldris, she carries both light and darkness, powers she has yet to fully control. When Chaos rises, Sera appears in Britannia and meets Tristan Liones, the heir of a destiny much like her own. Together, they are drawn into battles, secrets, and a bond that slowly grows between them. How will Sera's journey unfold against Chaos Arthur alongside the Four Knights of the Apocalypse? And will she succeed in saving both clans from her grasp?