When a prominent politician is found dead in a locked room, Thomas Pitt must navigate the treacherous social hierarchies of Victorian London to uncover the truth. As Pitt investigates the suspicious circumstances surrounding the death, he faces resistance from the upper echelons of society who prefer to keep their secrets buried. His wife, Charlotte, utilizes her own connections to assist in the inquiry, providing a dual perspective on the rigid class structures of the era. The narrative follows a traditional investigative framework, focusing on the methodical collection of clues and the interrogation of witnesses within the atmospheric setting of 19th-century England.

This work is characterized by its meticulous attention to the social mores and political climate of the Victorian era. The narrative structure relies on the interplay between the investigative rigor of Thomas Pitt and the intuitive social navigation of his wife. Readers often note the atmospheric density and the focus on the rigid class boundaries that define the characters' motivations. The book functions as a study of institutional corruption, using the mystery format to expose the vulnerabilities of the ruling class.