It's 1811, and the threat of revolution haunts the upper classes of King George Ill's England. A beautiful young woman is found savagely murdered on the altar steps of an ancient church near Westminster Abbey, and the dueling pistol found at the scene and the damning testimony of a witness both point to one man--Sebastian St. Cyr.

The young wife of an aging marquis is found murdered in the arms of the Prince Regent. Around her neck lies a necklace said to have been worn by Druid priestesses-that is, until it was lost at sea with its last owner, Sebastian St. Cyr's mother. Now Sebastian is lured into a dangerous investigation of the marchioness's death-and his mother's uncertain fate.
As he edges closer to the truth-and one murder follows another-he confronts a conspiracy that imperils those nearest him and threatens to bring down the monarchy.

Murder has jarred London's elite. The sons of prominent families have been found at dawn in public places, partially butchered, with strange objects stuffed in their mouths. Once again, the local magistrate turns to Sebastian St. Cyr, Viscount Devlin, for help. Moving from the gritty world of London's docks to the drawing rooms of Mayfair, Sebastian confronts his most puzzling--and disturbing--case yet.