As she returns for her final year at Hogwarts, Brooklyn starts to notice some very strange things happening at the school, more strange than normal. She feels out of place until she meets a student also in her seventh year, Rose. Although Brooklyn had never seen Rose at Hogwarts before, they quickly become friends. When Rose starts making excuses to leave classes and their get togethers early, Brooklyn starts to become suspicious and follows her one day to find her in the last place she would expect.