"Incensed at the slur on Adèle, whom he sees as a paragon of virtue, the Vicomte challenges Déroulède to a duel, a fight which Déroulède does not want - for he knows and respects the boy's father, the Duc de Marny.Swords drawn, the fight ensues in the centre of the salon but despite his noble lineage, the Vicomte de Marny is no match for Déroulède's swordplay, especially when addled with wine and rage.