Angélique has retired to her estate, but King Louis XIV entrusts her with a mission involving Bachtiary-bey, the Persian ambassador. The diplomat soon falls in love with the young woman and confines her in order to conquer her resistance. When she returns to court, Angélique is the object of a rumour; she is said to be the king's new mistress, which exasperates Madame de Montespan.