Amy Dorrit, a young woman born and raised within the confines of the Marshalsea debtors' prison, navigates the complexities of social status and institutional corruption after her family's sudden change in fortune. Amy serves as the moral anchor for her father, William Dorrit, who maintains a facade of dignity despite his long-term incarceration. When Arthur Clennam returns to London and encounters Amy, he becomes entangled in the mystery of his own family's business and the pervasive influence of the Circumlocution Office. The narrative utilizes a third-person omniscient perspective to examine the rigid class structures and bureaucratic failures of nineteenth-century England. The characters must reconcile their personal integrity with the crushing weight of societal expectations and financial ruin.

Readers and critics frequently highlight the novel's biting satire of government inefficiency and the stark portrayal of the Victorian class system. Discussion often centers on the character of Amy Dorrit as a symbol of selfless endurance amidst systemic cruelty. Many observers note the dense, intricate plotting that characterizes Dickens's later works, which rewards careful attention to the interconnected lives of the cast. The atmosphere of the Marshalsea prison is often cited as one of the most vivid settings in the author's body of work. Scholars emphasize the book's enduring relevance in its examination of how institutional structures shape and constrain human potential.