Arthur Pendragon has established himself as High King, building a reign of prosperity and peace in Britain. Only King Lot and his allies in the North stand in the way of perfect unity across the Isles.
At the end of a bitter winter, Gawain, Lot's son, is summoned to Arthur's court at Caerleon, where he and the other northern princes will live as hostages. Even as he learns this, he remembers his teacher's last words, "Seek the Ring of Light."
The journey tears Gawain and his cousins away from their homes, and thrusts them into a world slowly shaping into a new era, and it will make them men, or it will destroy them.