The central conflict hinges on the moral and legal consequences of a suspected forgery involving a contested inheritance at Orley Farm. Lady Mason, a woman of complex character, faces the potential exposure of a crime that would strip her son of his property and destroy her social standing. The narrative follows her interactions with Sir Peregrine Orme, her son Lucius, and the legal professionals tasked with uncovering the truth. Trollope employs a third-person omniscient perspective to examine the psychological weight of guilt and the rigid structures of Victorian law. The story unfolds through a series of social and courtroom maneuvers that test the integrity of all involved parties.

Readers and critics frequently highlight the novel as a pinnacle of Trollope's ability to balance intricate legal plotting with profound character development. Discussion often centers on the moral complexity of Lady Mason, whose actions provoke varied interpretations regarding her culpability and the necessity of her deception. The narrative is noted for its atmospheric depiction of Victorian society and the author's confident, steady prose style. Many observers appreciate the meticulous construction of the courtroom scenes, which serve as a centerpiece for the broader thematic exploration of inheritance and fraud. The work remains a significant point of reference for those interested in the evolution of the legal novel within the nineteenth-century canon.