Affair of the Diamond Necklace
Rosalie ambushes Polignac's carriage in front of Polignac's daughter, Charlotte, but Oscar stops her. After an incident where Charlotte loses her mind and commits suicide, the Duchess de Polignac goes to Jarjayes's Mansion and tells Rosalie that if she didn't come with her, she would tell the authorities that Oscar was the protector of the sister of Jeanne of Valois-Saint-Rémy, the mastermind of the "Affair of the Diamond Necklace". Rosalie decides to go; soon, she realizes that the Duchess de Polignac intends were to marry her to the Duke of Guiche, Charlotte's ex-fiancé and cause of her suicide. She escapes, and marries Oscar's friend, Bernard Chatelet, and meets Oscar again during the Storming of the Bastille.