In the spring of A.D. 1510, young Claude Leclerc leaves his widowed mother and two sisters in southern France and travels to Paris to begin his training for the priesthood. The Church is very powerful but also very corrupt, and Claude is not sure what he believes about God. One day he learns the words to an old hymn and is drawn to the lines about "David's Royal Fountain" that will "purge every sin away." Claude yearns to find this fountain and receive its cleansing, and at last he dares to approach the famous Dr. Lef