On a January night in 1817, former cavalry officer Captain Gabriel Lacey is summoned to the banks of the Thames to identify a body. When Lacey looks down at the pretty young woman, cut down too soon, he vows to find her murderer. His search takes him from the seamy streets of the East End, to gatherings of the London ton in Mayfair, to the chambers of respectable Middle Temple barristers.

London, 1819: When Brewster, my bodyguard, comes to me about a murder of a pugilist—and what’s more, says his wife has summoned me—I must hasten to St. Giles to find a killer before Brewster is arrested for the crime. This is made difficult because my wife’s late husband’s odious cousin has materialized to try to wrest her son into his care. After all, seven-year-old Peter is a viscount, and his cousin wants to get closer to the title.But how close? If Peter’s life is in danger, I must remain, but Brewster risks hanging for the death of his wife’s brother-in-law. He’s done too much for me to turn my back on him, but the devil if I’ll let the Breckenridge cousin get his clutches on Peter.It will take all my perseverance, and a few wiles, to plough through these difficulties. In the meantime, I meet a Runner who teaches me about crime and punishment in this enlightened age, and Brewster’s old trainer, who...

London 1816 After rescuing a lovely woman from an attempted robbery, Captain Lacey discovers that she's the widow of a colonel who had been accused of murdering an English officer during the recent war. Lydia declares that her husband was innocent and that she knows the true culprits' identities. Intrigued, Lacey begins to investigate, and soon finds himself mired in scandals past and present.

London, 1816 Cavalry captain Gabriel Lacey returns to Regency London from the Napoleonic wars, his career ignominiously over. He stumbles onto the case of a kidnapping, the accused a prominent MP. Lacey's search for the girl leads to the discovery of murder, corruption, and dealings with a leader of the underworld. At the same time, Lacey must face the everyday troubles of his own life.