Uther tells the story of young Uther Pendragon, cousin to the sorcerer Merlyn and father of Arthur, the future King of Britain. In his boyhood, Uther divides his time between two radically different worlds. Within the solid walls of Camulod, along with Merlyn, he enjoys the luxuries of a civilized community and trains in the Roman military style to realize his heroic dream - commanding Camulod's cavalry. But still he is pulled back to the dark land of his birth, the harsh, primitive world of his father's people, the Pendragon of Cambria, where creature comforts are few and brutal justice is administered swiftly at the end of a sword.

At the death of his father, King Uric, a new king must be elected from among the chiefs. Is Uther fit to lead, or has he grown soft during his time in Camulod, forgetting the ways of his people? Where do his true loyalties lie? When the ambitions of the vicious King Lot of Cornwall threaten the peace of Britain, Uther must lead his people into a disastrous and bloody war against a man he has detested since childhood. Even worse, Uther must choose, once and for all, between his love for Merlyn's magnificent Camulod and the Pendragons of Cambria, the land we now call Wales.