 Lady Frampul's chambermaid, Prudence, dresses up as queen for the day and presides over a mock "court of love".As part of their theatrical project, Prudence and Lady Frampul decide to dress up the Host's adopted son Franck in a cross-gender attire as Laetitia, a waiting-woman.Lord Beaufort, guest to Lady Frampul, falls in love with Laetitia and marries her in secret, only to be denounced for marrying a boy.