Molyneux is in love with Lady Mary's cousin Lucy and courts her at the ball. Beaucaire charms the company, and Lady Mary asks to be left alone with him. He begs the rose in her hair. She says that he must earn it by escorting the aged Countess of Greenbury to supper. To obtain revenge, Winterset persuades Captain Badger, a famous swordsman, to quarrel with Beaucaire, who challenges him to a duel. They fight on the terrace and, to everyone's surprise, Beaucaire is the victor. He takes the old Countess into supper and receives his rose from Lady Mary.