Prince Victor looks in vain for a swan which was wounded by one of his servants. Instead he discovers a beautiful girl with golden hair who has an arrow in her shoulder. She is dumb and can't explain her origin. He falls immediately for her. The girl quickly recovers, but disappears mysteriously.
Princess Stella wakes up every day in a different form. She has one week left until her eighteenth birthday, and if she cannot be cured of this strange illness, she will continue to transform throughout her life.