The courage of the Sioracs, father and son, saved Sarlat from starvation. During a ceremony in their honor in front of the entire town, a demonstration duel between Pierre and François turns into a merciless brawl. François reveals Pierre's Catholic medal, provoking Siorac's anger. Disobeying his father, François asks Fontenac for Diane's hand, who sets a trap for Siorac.