Driven by deep-seated resentment, the impoverished Lisbeth Fischer initiates a calculated campaign to dismantle the social and financial stability of her affluent relatives. Lisbeth, known as Cousin Bette, maneuvers through the rigid social hierarchies of 1840s Paris, utilizing the vulnerabilities of those around her to exact revenge for years of perceived slights. Her objective is the systematic destruction of the Hulot family, a goal she pursues by manipulating their secrets and exploiting their moral failings. The narrative operates through a third-person omniscient perspective, providing a clinical examination of human greed and social ambition within the French bourgeoisie.

Discussion often centers on the stark realism and the psychological depth of the titular character, who stands as one of literature's most compelling antagonists. Readers frequently highlight the precision with which the author dissects the moral decay of the Parisian upper class during the reign of Louis-Philippe. Critics often note the narrative's relentless pacing and the way it balances individual character studies with broader social commentary. The work is widely recognized for its ability to maintain tension through the slow, methodical unraveling of the Hulot family's reputation and fortune.