In a ceremony of discipleship called a bai see, the Dragons learn a part of Ming's history about which none of them were previously aware... including, apparently, the dragon himself. It is the Five Dragon Sword, and both it and its history are a mystery to Ming and Grandfather Chen. Before the truth behind the mystery can be discovered, the kids are introduced to a new student in their school, a pretty Korean girl named Joanie Chae, and they soon learn that Joanie has a secret of her own. When they are given the story of the Five Dragon Sword, the Dragons find that Joanie Chae and her grandfather, Yi Woosun, are tied to it more closely than they could have imagined. What follows is a trip to the past - fifteen centuries in the past - and taking them to ancient Korea, not only to learn about the sword, but to retrieve it from Gokturk brigands who have stolen it from the Silla king."