When twelve-year-old shepherd boy Peter finds a man lying apparently dead near his hut in the hills, little does he know that it will change his whole life. The mysterious man turns out to be just barely alive, and the resourceful Peter nurses him back to health. In gratitude, the man, who refuses to give his name, teaches Peter to read, write and fight with a sword - all skills that are not usually available to a peasant in twelfth-century England. Armed with his surprising education and his natural intelligence, Peter follows his luck on a series of adventures that see him honing his skills in the service of Baron de Cours in Devonshire, then chancing his arm in turbulent Normandy. Sooner or later, however, he must return to England, where the baron's beautiful daughter Amelia waits silently. Where will Peter's luck lead?