Young shepherd Duun Howl, his mother and older twin brother and sister have lived in Tarrkaven since the War ofKalamity displaced them from their native land and separated them from their father. Members of the Knot Kovenant, they have been under the protection of a benevolent baron, who sponsored his brother to attend Skyskape Akademy, the country's premier aviation school.


Just before graduation, Avo mysteriously disappears and Tarrkaven is attacked by planes from an unidentified army. The baron recruits the young shepherd to go undercover to Skyskape with the goal of finding out if the school has been infiltrated by insurgents, but Duun's goal is to find Avo and bring him home.