Brighton, England, 1811. The beautiful wife of an aging Marquis is found dead in the arms of the Prince Regent. Draped around her neck lies an ancient necklace with mythic origins-and mysterious ties to Sebastian St. Cyr, Viscount Devlin. Haunted by his past, Sebastian investigates both the Marchioness's death and his own possible connection to it-and discovers a complex pattern of lies and subterfuge. With the aid of his lover, Kat Boleyn, and a former street urchin now under his protection, Sebastian edges closer to the killer. And when one murder follows another, he confronts a conspiracy that threatens his own identity...and imperils the monarchy itself.