The year of our Lord 1212. Europe is in full turmoil when an assorted troop of Crusader children, led by the shepherd boy Esteban de Cloyes, advances through the kingdom of France with a feverish and joyful atmosphere. Their goal: Jerusalem, which they intend to liberate without any weapons, using only the strength of faith. Meanwhile, the Almohad Caliph al-Nasir is preparing a powerful army in Seville to march on Rome, which is living in fear. He has sworn that his horses will drink from the Vatican fountains. Religious fervour is mixed with hatred of the other, the different. And the Jews are viciously persecuted, robbed and massacred. As some children of this historical and hallucinated crusade will be too... Among these children is Juan, son of a noble Castilian killed in an ambush, along with his companions Pierre and Philippe.