Wang Li Xun, the Crown Prince, goes out hunting for the Celestial Flower to save his mother from a terminal illness. When he nearly dies from the attack of a mythical beast, he is saved by a mysterious boy who lives in the mountains.

To repay his kindness, Li Xun offers the boy a place to stay in his royal palace and employs him to be his personal bodyguard. But little does he know that he has brought home a girl instead.