A joyful atmosphere is felt throughout Mistmantle Island as the coronation day of the squirrel Crispin approaches. The irreplaceable silver and gold-grained Heart Stone, which can only be held by the priest and the legitimate governor, is being prepared for the occasion. The newly achieved peace in the island soon is threatened: a ship beaten by a storm appears in the island, a dramatic revelation about the sacred Heart Stone is made, and the extrasensory powers of a young man reveal that a misfortune is coming. Against his will, Urchin is taken to a hostile island where Silverbirch, the maniac king, and Smokewreath, the king's wizard, await him. There he will face great challenges and discover a secret from his past that will change his life forever. "Se siente un ambiente festivo en la isla Mistmantle, falta poco para la coronacion de la ardilla Crispin. La Piedra de Corazon, la irremplazable piedra con vetas de oro y plata que solo el sacerdote y el legitimo gobernante pueden sostener en la mano, esta siendo alistada para el evento. La recien lograda paz en Mistmantle pronto se vera amenazada. Un barco golpeado por la tormenta aparece en la isla, una revelacion dramatica sobre la reverenciada Piedra de Corazon sale a la luz y los poderes extra sensoriales de un joven revelan un mal que se aproxima. Urchin es llevado contra su voluntad a una isla hostil donde el maniaco Rey Silverbirch y su hechicero, Smokewreath, lo esperan ansiosos. Alli, tendra que enfrentar grandes desafios y conocera un secreto de su pasado que cambiara su vida para siempre."