In the village of Eldora, an unintended rain-summoning rite unleashes demons long confined by eight ancient keys. The malevolent creatures claim Quade's parents as victims, propelling him into a relentless quest for vengeance. Determined to avenge their deaths, Quade unearths a shocking truth – he is the chosen successor of the very person who originally sealed the demons.This revelation adds profound complexity to Quade's journey, intertwining his personal tragedy with a destiny that holds the fate of human world in the balance. As Quade races against the relentless march of time to recover the elusive ancestral keys, he delves into the depths of ancient mysteries that shroud the world in magic and menace. In the pivotal moment, Quade makes a life-altering decision, signing an agreement with the Astral Covenant to become a Celestial Nexus. This pact requires him not only to wield unimaginable power to seal the unleashed demons but also to submit that very power, facing an uncertain fate once his mission is complete.