The movie opens with Arata accidentally touching "Hermes Apocrypha," Lilith"s grimoire. Instantly, a blinding white glow engulfs him and a girl materializes before his eyes. She introduces herself as Lilim, claiming both Arata and Lilith are her parents. Her arrival coincides with a shift in reality: the forbidden Eternal Library awakens. Inside lies the pinnacle of alchemy, the White Demon Lord, sealed within. The White Demon Lord schemes to destroy Arata and the Trinity Seven in order to seize the throne of Demon Lord. Possessing immense power, he assaults Arata, sparking a dire crisis that forces Arata and the Trinity Seven to defend the world in this final showdown.