Undine Spragg, a social climber from the Midwest, attempts to navigate and dominate the rigid hierarchies of New York high society through a series of calculated marriages. Driven by an insatiable desire for status and material wealth, Undine utilizes her beauty and her father's financial resources to infiltrate elite circles. She faces opposition from established socialites who view her as an outsider and from the consequences of her own impulsive, mercenary decisions. The narrative is presented through a third-person omniscient perspective that exposes the internal motivations of the characters while maintaining a critical distance from their social maneuvers. The world is defined by the strict, often hypocritical codes of Gilded Age society, where financial stability and social standing are the primary metrics of success.

Readers and critics frequently describe this work as a biting and unsentimental critique of the American dream during the Gilded Age. Discussion often centers on the character of Undine Spragg, who is widely analyzed as one of the most complex and unapologetic anti-heroines in literature. Many readers highlight the precision of the prose and the effectiveness of the author's social commentary, noting that the pacing remains consistent despite the lack of traditional heroic arcs. The novel is often praised for its ability to maintain relevance through its exploration of ambition, greed, and the shifting values of a society in transition. Critics emphasize that the balance between character development and social critique is maintained throughout the narrative, providing a comprehensive look at the era's cultural landscape.