The task had taken shape thanks to the end of a war and the inconvenient way secrets had of bubbling to the surface. It went without saying that it was going to be difficult. But then murder always was...

London, 1817: Beneath a silent moon, a stranger steals into London, bound to complete a grim task that began in the shadows of the past....

On that same evening, amid the splendor of Glenister House, London's haut ton celebrates, still flush with victory in the Napoleonic Wars. Among the revelers are Mélanie and Charles Fraser—he, a former spy connected to the most powerful families in Britain, and she his exquisite bride, who has charmed all of society.

That night, stunning revelations pull the couple back into the world of intrigue they thought they'd escaped, forcing them to untangle a web of lies that spans generations and threatens the fate of nations. But the truth is a deadly weapon that could lead to scandal, tragedy, and murder.

An assassination, a secret society, and the dangerous liaisons of Charles's own family lead the Frasers from the lamplit streets of the city to a castle on the Scottish coast. The stakes of this game are the lives of those Charles holds most dear, and the trust of the enigmatic woman with whom he shares his name...and his bed.