Capricia, a vagabond, knows that there is something different about her – something that is constantly getting her into trouble. She can’t fully understand what, for example, causes a piano to play on its own when she is around. When she encounters a menacing castle hovering over the town of Muddleton, her curiosity is sparked: who are its mysterious inhabitants, and why are they trying to block out everyone from the outside? When Capricia and her new friends uncover the secret of Wild Castle, her life turns upside-down.