To celebrate the last day of his bachelorhood, Florestan invites the entire staff of Coquenard’s shop for a party in Romainville. Hélène and Ermerance disguise themselves as working girls using the names Véronique and Estelle. Coquenard finally receives his national guard nomination, and in his excitement he hires Véronique and Estelle as shop assistants. "Véronique" succeeds in gaining Florestan's attention, to the annoyance of Madame Coquenard, whose husband also shows interest in the new flower girl. Florestan invites Véronique and Estelle to join the party.