On the eve of a decisive battle against the Saxons, Gwenhwyfar prevails upon Arthur to put aside his father's Pendragon banner and replace it with her own Christian banner. As her religious fanaticism grows, relations between Avalon and Camelot grow strained. Still, in her desperation over her failure to carry a child to term, she asks Morgaine for help, threatening to have an extramarital affair so she can become pregnant. In an attempt to keep Gwenhwyfar from doing so, Morgaine reveals that Arthur already has a son, though he does not know it.