The film’s narrative kicks off when Arata accidentally comes into contact with “Hermes Apocrypha,” a mystical book belonging to Lilith. Instantly, he is surrounded by a dazzling white light, and a mysterious girl materializes before him. She introduces herself as Lilim and regards both Arata and Lilith as her parents. Her arrival coincides with a significant shift in the world: the awakening of the forbidden Eternal Library. Within this library lies the ultimate achievement of Alchemy, the White Demon Lord, who schemes to destroy Arata and the Trinity Seven to seize the title of Demon Lord. Armed with immense power, the White Demon Lord launches an assault on Arata, sparking a dire situation where Arata and the Trinity Seven must fight to save the world in this climactic showdown.