Philomel, a fake princess who conspired with her mother to impersonate the real princess and instigate a war between the Magic Tower and the Empire, is sentenced to death after her crimes are exposed. However, she vehemently protests her innocence, claiming that she is not the one who deserves to die. She had only been curious about a suspicious book she found in the garden, a book that details her death. Uncertain if the book is real, she finds that everything happening around her mirrors the book's events. To survive, the 9-year-old Philomel sets out to change her reputation, eventually finding the Emperor's real daughter, Ellensia, and embarking on a new life. But then, the Emperor, who she expected to hate her, actively searches for her, as does her seemingly uninterested fiancé and even her father, the Master of the Magic Tower. Will Philomel uncover the truth behind the suspicious book and find her place in the world?