On a cloud-shrouded night in November 1816, six-year-old Colin Fraser vanishes from the safe cocoon of his family's Berkeley Square home. For his father Charles, an idealistic MP, former intelligence agent, and grandson of a duke, and mother Mélanie, a beautiful war refugee and society's most charming hostess, it is a tragedy that will rip their extraordinary marriage asunder and force them to question everything they believe in. Colin's captors are demanding a bizarre ransom: an exquisite ring surrounded by the promise of power. The search for it will pull the Frasers into a maze of intrigue that winds through the lowest and highest levels of London secrets -- revealing layer upon layer of deception and betrayal, and a shocking truth that binds Charles and Mélanie inextricably together ... even as it threatens to destroy them both.