When Arata Kasuga touches Hermes Apocrypha, the grimoire that belongs to Lilith Asami, a girl named Lilim appears calling the two of them her parents, and the sealed Eternity Library wakes with her. Inside waits the White Demon Lord, an alchemical creation set on taking the Demon Lord seat from Arata and the Trinity Seven mages of Royal Biblia Academy. Arata draws on Hermes Apocrypha's magic against the threat the library has loosed, in a feature film that continues the TV series.