Still, Guenevere secretly mourns the loss of her beloved Lancelot, who has returned to the Sacred Lake of his boyhood, hoping to restore his faith in chivalry in the place where he learned to be a knight.

In a glittering Pentecost ceremony, new knights are sworn to the Round Table, including Arthur's nephews, Agravain and Gawain.

Morgan le Fay, now the mother of Arthur's only son, Mordred, has become the focus of Merlin's age-old quest to ensure the survival of the house of Pendragon.

A bleak shadow falls again across Camelot—and across the sacred isle of Avalon, where Roman priests threaten the life of the Lady herself.

At the center of the storm is Guenevere, torn between her love for her husband, her people, and Sir Lancelot of the Lake.