: While some view it as a profound philosophical treatise on the "black-hole" of human nature and a satire of the aristocracy, others dismiss it as a collection of repetitive, boring, and nauseating fantasies. Psychological Insight

The novel is structured as a systematic catalog of sexual "passions" and depravity. It follows four wealthy libertines—the Duc de Blangis, the Bishop of X***, the President de Curval, and the Financier Durcet—who seclude themselves in the remote Silling Castle in the Black Forest for four months.