A destitute aristocrat acquires a magical talisman that grants every desire while simultaneously consuming his remaining lifespan. Raphael de Valentin, facing total financial ruin and social disgrace in Paris, encounters a mysterious antique dealer who offers him a piece of shagreen skin. This object functions as a literal manifestation of the owner's will, shrinking in size with every wish granted and directly correlating to the user's physical vitality. The narrative follows Raphael as he navigates the consequences of his newfound power, balancing his pursuit of hedonistic excess against the inevitable approach of his own mortality. Balzac employs a third-person omniscient perspective to examine the psychological decay of his protagonist within the rigid social structures of 19th-century France.

Readers and critics frequently note the balance between Balzac's meticulous realism and the central fantastic premise of the shagreen skin. Discussion often centers on the novel's critique of materialism and the psychological toll of living a life defined by constant desire. Many highlight the intensity of the prose, which captures the frenetic energy of Parisian society during the early 19th century. Scholars often point to this work as a foundational text for understanding the broader scope of the Comédie humaine. The narrative is widely regarded for its ability to ground high-concept philosophical questions in the visceral, often grim, reality of the protagonist's decline.