After the fall of the Roman Empire, the Britons are under attack from the barbaric Saxons, and the old religion of the goddess is threatened with oppression by the rise of Christianity.
Morgaine abandons her son, Mordred, leaving him in the hands of her aunt, Morgause. When she returns to Camelot, Morgaine meets Sir Accolon, and finds herself drawn to him - but thanks to Guinevere's manipulations she ends up marrying his father.