A young bourgeois man finds himself entangled in a consuming and socially transgressive romance with a celebrated Parisian courtesan. Armand Duval pursues Marguerite Gautier, a woman defined by her beauty and her status within the demi-monde of 19th-century Paris. He seeks to liberate her from her lifestyle and secure her exclusive affection, while she must navigate the rigid expectations of her patrons and the fragility of her own health. The narrative framework utilizes a retrospective structure, often framed through the eyes of an observer who reconstructs the tragic events after the fact. The story examines the logical constraints of class mobility and the physical toll of disease in a society that commodifies intimacy.

Readers frequently highlight the novel's ability to balance sentimental romanticism with a stark, realistic portrayal of social exclusion. Discussion often centers on the characterization of Marguerite as a figure of both agency and entrapment within her environment. Critics often note the pacing as deliberate, allowing for the gradual development of the central relationship before the inevitable tragic conclusion. The work is widely recognized for its influence on subsequent romantic literature and its enduring impact on the portrayal of the fallen woman trope in Western fiction.