Two systems: the Nazi machine versus the Vatican and Allied diplomacy. Two men are struggling from the inside: On one side, Kurt Gerstein, a real-life chemist and SS officer, supplies the death camps with zyklon B while he tirelessly denounces the crimes and alerts the Allies, the Pope, the Germans and their churches of their murderous policy against the European Jews. Kurt does this at his own risk, and at the risk his family's welfare and safety. On the other side, Ricardo Fontana, a young Jesuit, is a fictitious character who represents all the priests, who were determined to struggle against savagery; many of them paying for their courage with their lives. Countless priests, some known, others anonymous, were simply not content to live with the silence of their church's hierarchy vis-à-vis the Nazi machine.