In 1491 Italy, Mangus the Magician must free a princess from a terrifying ghost. But Mangus doesn't believe in ghosts. Actually, he doesn't even believe in magic. But his servant boy, Fabrizio, is a secret friend of the princess and is determined to prove that the ghost is real.
Twelve-year-old Fabrizio goes to the castle with his master to find out whether the princess is really seeing a ghost.