4A boy who can heal from any injury is destined for a lot of suffering. Orphaned and illegally enslaved, it seems like things can't get worse for Kai, a skilled fighter with a cynical attitude and rapid healing powers. But when Kai has a chance encounter with a fearless princess, his dangerous adventures are just beginning. Now Kai is a brother to Wil, a reckless prince trapped by destiny, and Cara, a fierce princess dodging a political marriage and fighting attacks from the evil North. But when Kai suddenly disappears, how far will Cara go to save Kai, and her kingdom, from the queen of the North?