William has just received the best present of his life. It's an old, real-looking stone and wooden model of a castle, with a drawbridge, moat, and a finger-high knight to guard the gates. It's the mysterious castle his housekeeper has told him about, and even though William is sad she's leaving, w the castle is his!William can't wait to play with it--he's certain there's something magical about the castle. And sure eugh, when he picks up the tiny silver knight, it comes alive in his hand!Sir Simon tells William a mighty story of wild sorcery, wizards, and magic. And suddenly William is off on a fantastic quest to ather land and ather time--where a fiery dragon and an evil wizard are waiting to do battle . . . .