In Book IV, the story reaches its climax. Amadis of Gaul has rescued Princess Oriana from a forced marriage to the Emperor of Rome. She is secretly his wife and the mother of his son. Her father, King Lisuarte of Great Britain, and the Emperor of Rome raise armies and prepare to go to war. Amadis draws on his family and his many friendships to raise his own army.In the past, Amadis has saved King Lisuarte in battle. This time they pledge to fight to the death. Only a miracle can save them from mutual destruction.Meanwhile, the enemies of Amadis and Lisuarte see their chance to defeat them both.