In the world of Prester, flight is the dominant mode of transportation, made possible by Claudia Fluid: a liquidized form of the crystals that are produced on the planet. An organization known solely as "the Guild" has absolute authority over the skies, with a monopoly on the engines that make use of this fluid. Moreover, as ecological disasters destabilize the warring countries of Anatoray and Disith, the Guild also arbitrates in the disputes between the two. Caught in the middle of the conflict are Sky Couriers, piloting small, two-person vanships that fly freely through the sky.
