The novel is set around the year 1820. Auguste de Maulincour, a young cavalry officer, walking in a Parisian district of ill repute, sees from afar a young married woman, Clemence, with whom he is secretly in love. He sees her enter a house of ill repute. The young married woman is widely recognized in Parisian society as a paragon of marital virtue-what is her secret? Auguste decides to spy on the woman to find out. He finds her in the company of a man named Ferragus...