When his life is saved by a stranger, Prince Caolan feels an immediate connection to the man, and promises to meet him again. Forced to break that promise to protect his brother Donal, Cao-lan waits for the day he can return to the forest.
On their trip home almost a year later, he and Donal are tricked by their stepmother into attempt-ing to steal the legendary Horse of Bells from the infamous Dark Prince Tuathal. Honour-bound to accept the geis she set them, the brothers leave their castle to complete the quest.
During their journey, they meet the enigmatic Traveller. Caolan is confused and troubled by his reaction to the man. Is he a friend, or are his intentions darker and more deadly?