A lost princess. A daredevil knight. A quest like no other. They say that Blanche is King Arthur's daughter...but only Queen Guinevere knows that for sure, and she's not telling.To prove herself the king's rightful heir, Blanche must travel to the lost castle of Carbonek as the guardian of the mysterious Holy Grail. But Carbonek houses many secrets-some of which could destroy Arthur's kingdom. Meanwhile, young Sir Perceval returns...