A young, devout servant girl finds herself cast out of her position and into a precarious life of poverty after becoming pregnant by a fellow servant. Esther Waters struggles to maintain her independence and provide for her illegitimate son in the rigid, unforgiving social landscape of late 19th-century England. She faces constant economic instability, the moral judgment of her peers, and the persistent influence of her former lover. The narrative follows her through decades of hardship, utilizing a third-person perspective that remains closely tethered to Esther's internal experiences and observations of the class divide. Her primary objective is survival and the preservation of her son's future against the backdrop of a society that offers little support to women in her position.

Readers and critics frequently highlight the novel's commitment to social realism and its unvarnished portrayal of the Victorian working class. Discussion often centers on the author's ability to maintain a sympathetic yet objective distance from the protagonist's struggles. Many observers note the effectiveness of the gambling subplots in illustrating the precarious nature of financial security during this era. The pacing is often described as deliberate, reflecting the slow, grinding nature of Esther's daily existence. Scholars frequently cite this work as a significant example of naturalism that avoids sentimentalizing the hardships faced by its characters.