Three twelve-year-old cousins, Jasper, Wendel, and Victoria, during their fall break from school, trek to their grandmother's Belgium castle in the Blue Ridge Mountains of North Carolina. Although the forty-room, three-towered castle offers many opportunities for adventure, the basement door of the castle has been off-limits for over 150 years; however, when the three cousins venture past the forbidden basement door, they discover an enchanted land where in their wildest imaginations, they would have never believed.