Paris 1505. Tragedy strikes at the rue Daniel bookshop of Arnoul De La Porte. Alone with his little son Paoul, he finds comfort in the writings of Luther and becomes involved in the illegal Reformation Movement. As Huguenot heretics, his descendants must walk a dangerous tightrope of pretence to prevent being executed. Luc is betrayed and escapes to relatives in Flanders with Sibylle, the daughter of his Protestant mentor.