A young woman enters the precarious world of governessing, only to find her moral integrity tested by the cruelty and indifference of the wealthy families she serves. Agnes Grey, the daughter of a clergyman, seeks financial independence by securing positions as a governess in two different households. She faces the physical and psychological toll of managing unruly, spoiled children while navigating the rigid social hierarchies of the nineteenth-century British upper class. The narrative is presented through a first-person perspective, providing an intimate look at the isolation and professional vulnerability inherent in her role. Her primary objective is to maintain her dignity and personal values despite the constant opposition of her employers and their charges.

Readers and critics often note the stark realism and understated tone that distinguish this work from the more dramatic novels of the author's sisters. Discussion frequently centers on the book's candid examination of the psychological burden placed upon governesses during the Victorian era. Many highlight the effectiveness of the protagonist's internal monologue in conveying her quiet resilience against social pressures. The narrative is praised for its lack of melodrama, favoring instead a precise observation of human behavior and social hypocrisy. Readers often find the book a significant contribution to the literature of the period due to its focus on the mundane yet difficult realities of working-class women.