The narrative centers on the intersection of Eugene de Rastignac’s social climbing and the tragic, self-destructive devotion of Pere Goriot. Rastignac, a young law student from the provinces, arrives in Paris with aspirations to ascend the social hierarchy, eventually finding himself entangled in the lives of the residents of the Maison Vauquer. He is opposed by the rigid, exclusionary structures of Parisian high society and his own lack of capital. The story unfolds through a third-person perspective that meticulously documents the moral decay of the city and the physical squalor of the boarding house, contrasting these with the opulent salons of the aristocracy. The narrative framework relies on the gradual disillusionment of the protagonist as he witnesses the consequences of unchecked ambition and familial sacrifice.

Readers and critics frequently highlight the novel as a foundational text for the realist movement due to its unflinching portrayal of social ambition. Discussion often centers on the stark contrast between the protagonist's moral evolution and the tragic decline of the titular character. Many observers note that the pacing is deliberate, allowing for a deep exploration of the psychological motivations behind each character's actions. The effectiveness of the world-building is often praised for its ability to render 19th-century Paris as a tangible, suffocating force. Scholars frequently emphasize how the thematic threads of greed and social status remain relevant to contemporary discussions regarding class mobility.