The nation of Valentine was once a grand kingdom with powerful magic. With the power of a magical relic known as the "Cauldron," King Valentine subdued the neighboring nations and brought them under his control. His kingdom enjoyed a long period of prosperity... but a sudden disaster destroyed it overnight. War broke out between the Fairy Kingdom of Ringford and the warrior nation of Ragnanival over ownership of the now-abandoned Cauldron, and control of the wasteland that was once Valentine. With the battle growing fiercer by the day, Demon Lord Odin, King of Ragnanival, sets forth a plan to conquer Ringford and claim the Cauldron once and for all. Meanwhile, in the neutral realm of Titania, King Edmund had become a puppet king of his court sorcerer Urzur, who schemes to follow a forgotten prophecy and bring about the Armageddon; a prophecy stating that the world will be destroyed in five great disasters, but the survivors will become kings. As the nations struggle for control, the world steadily slips unknowingly toward its demise, and the prophecies become clear...

On the fantasy continent of Erion, a young girl named Alice climbs into her attic and opens a series of storybooks, and the tales within come to life. Erion is a land of scattered kingdoms, dominated by the warrior nation of Ragnanival, ruled by the Demon Lord Odin, and the forest realm of Ringford, ruled by the Fairy Queen Elfaria. The two powers wage war over the Crystallization Cauldron, a fearsome device that forges magical crystals by draining the life energy of the land, each side convinced it is too dangerous to leave in enemy hands. Above it all looms the prophecy of Armageddon, a foretold catastrophe destined to destroy the world. Across five interwoven books, the story follows five heroes bound to weapons called Psyphers: the Valkyrie Gwendolyn, the cursed prince Cornelius, the fairy princess Mercedes, the shadow knight Oswald, and the forest witch Velvet, whose fates entangle as war and destiny close in.