Sanlitun, the emperor of Annur, has three children set on three very different paths.
The eldest, Kaden, is heir to the Unhewn Throne and the strange, fiery eyes that mark the line of the rulers of Annur. Kaden finds himself in a remote mountain monastery, learning cryptic lessons from the monks in residence -- lessons that he doesn't yet understand the purpose of and doesn't see how they will make him a better emperor.
Kaden's younger brother Valyn is sworn to a group of elite warriors called the Kettral. Highly and brutally trained, the Kettral attack in small groups from the wings of the huge birds from which the warriors derive their name. They are the emperor's elite strike force -- the Navy Seals of Staveley's world.