A girl named Elinor was invited to study at a special school of magic called “Heather Blossom.” Here, education takes place without spells and magical items, but around there are plenty of characters from Celtic myths, and the night corridors hide dangers. To survive in this school, you must study well and avoid leaving your room in the evening—but even that doesn’t always help. Elinor becomes drawn into other people’s intrigues, and she will have to solve not only the current events, but also her own past.