It's a magical and mysterious creature that exists only in pictures and stories and in your own imagination… Amber and Alfie MacCaley are visiting their Uncle Angus who lives in an enormous castle. Alfie loves to play knights and imagines he might find a dragon. During the night, Amber hears some strange sounds coming from within the stone walls - grunting, scraping and jangling. Alfie is convinced these noises must be coming from a dragon and, against the warning of Uncle Angus, he heads off to the deepest depths of the castle to look for it. Amber follows and both children are amazed at what they find captive inside… Join Amber and Alfie on an adventure to discover the legend behind this magical and mythical beast.