In a quiet fishing village on northern France's Opal Coast, the birth of a peculiar child sparks a hidden war between extraterrestrial forces of good and evil.

In the 15th century, both France and England stake a blood claim for the French throne. Believing that God had chosen her, young Joan leads the army of the King of France. When she is captured, the Church sends her for trial on charges of heresy. Refusing to accept the accusations, the graceful Joan will stay true to her mission.