A strange legend attaches to the model castle given to William by his friend Mrs Phillips as her going-away present. William is drawn into the legend when the silver knight who guards the castle somes to life. In an action-filled fantasy quest he has to pit his wits against an evil sorcerer and a fire-breathing dragon to free an other-world kingdom from its ancient spell. An enthralling story of magic and adventure which weaves the everyday problems of growing up into the age-old battle beween good and evil.