In 1817 London, Before the Police, There Was Captain Winter.

London, 1817. A city teeming with life, yet lacking a professional police force. When a wealthy young woman is brutally murdered in an alley frequented by prostitutes, a shadowy government bureau in Whitehall dispatches its "special emissary"—Captain Winter. A veteran of the Napoleonic Wars and a gentleman forged by chance and conflict, Winter is uniquely equipped to navigate the treacherous currents of London society, from aristocratic drawing rooms to the city's grimmest taverns.

Without an army of officers or the aid of forensic science, Winter must rely on his wits and a network of unconventional allies. His childhood friend, a nobleman, opens doors in high society, while a wise Jewish physician uncovers secrets the dead cannot hide.

But Winter's most intriguing, and potentially dangerous, asset is Barbara Lightwood. Shrewd, beautiful, and operating as a discreet intermediary among the elite, Barbara shares a past with Winter from the war years. Their rekindled affair is fraught with wariness; she offers intimate information crucial to his investigation, but guards her own secrets fiercely. Like Winter, she is both cunning and capable of danger.

From grand houses to dimly lit streets, death stalks Captain Winter. He must tread carefully to unmask a killer, navigate a web of secrets and lies, and perhaps, in the process, save his own soul.