An uneasy peace is maintained between the races of Coryphon - the windwalkers who roam the steppes under sail, the ferocious Uldra and the alien aristocrats. Two hundred years ago, aliens captured the lands of Aluan and live in luxurious estates where the leaders of the grey-skinned Uldra nomads once ruled. When the self-proclaimed "Gray Prince" leads an uprising of the Uldra, who dream of expelling the aliens from the land of their ancestors, he must face resistance not only from the aliens, but also from the very history of the planet!