A young exorcist meets a cursed girl about his age. Exorcists in this world are supposed to either banish these lost spirits or make them regret whatever terrible things they have done. But this girl is different. She was cursed by a witch and mistaken for someone else. The boy wants to find who, and so the pair set off on an adventure to figure out how the curse can be undone. Will the two figure out why? Or how this mix-up happened? Why was the ghost girl cursed? What happens to the pair? Will one die and join the other or will one be brought back from the dead?