Agnes Grey experiences the harsh realities of Victorian social hierarchy when she accepts a position as a governess to escape her family's financial instability. Agnes seeks to establish her independence and moral integrity while navigating the capricious demands of wealthy, undisciplined employers. She faces the logical constraints of a rigid class system that views her as a servant rather than an educator, forcing her to endure isolation and professional humiliation. The narrative is presented through a first-person perspective, providing an intimate account of her internal development and observations of the families she serves.

Readers and critics often emphasize the understated, realistic tone that distinguishes this work from the more dramatic novels of the author's sisters. Discussion frequently centers on the precision of the social commentary and the quiet strength of the protagonist as she navigates a restrictive environment. Many highlight the effectiveness of the narrative in capturing the psychological toll of the governess role without relying on melodrama. The balance between character development and social observation is frequently cited as a primary strength of the text. Readers often note that the prose remains accessible while providing a sharp, insightful look at the limitations placed on women during the Victorian era.