Undine Spragg, a relentless social climber from the Midwest, arrives in New York City with the singular objective of securing a position within the highest echelons of elite society. Driven by vanity and a calculated disregard for others, Undine navigates a series of marriages and social maneuvers to acquire wealth and status. She faces opposition from established families who view her as an interloper, as well as the logical consequences of her own transactional approach to human relationships. The narrative employs a third-person omniscient perspective to dissect the rigid social hierarchies and the shifting economic landscape of early twentieth-century America.

Readers and critics frequently highlight the novel as one of Wharton's most biting and technically precise examinations of social climbing. Discussion often centers on the polarizing nature of Undine Spragg, whom many view as a fascinatingly complex anti-heroine rather than a traditional protagonist. The prose is noted for its clinical observation and lack of sentimentality, which effectively underscores the ruthless environment Wharton depicts. Many readers appreciate the way the narrative balances the protagonist's personal trajectory with a broader critique of the era's shifting values. The book remains a frequent subject of analysis for its enduring relevance regarding the pursuit of status and the cost of social mobility.