The Roman legions have long deserted the Isles and the despotic Uther Pendragon, High King of Celtic Britain, is nearing death, whilst his kingdom is torn apart by the jostling for his throne. Artorex, growing up in the household of Lord Ector, is chosen to be taught the martial skills of a warrior. He becomes a war chieftain and earns the trust to unite the tribes and become High King.