The world that witch-in-training Ena lives in hates and fears magic-users like her, but she still wants to do her best to help people and live up to the legacy of her father - a hero who helped to seal away the Monster King, humanity's ancient nightmare. She lives in seclusion with her wisecracking familiar Crow, making medicines for the nearby villages.
But one day Ena's daily toil is interrupted when a book in her storeroom suddenly starts to glow. Investigating it, she and Crow are accidentally sucked into a phantasmagorical world that exists inside a magic seal, where they meet an amnesiac boy with troubling origins. The three band together in an uneasy alliance in order to escape, but just what's REALLY going on here?