In the cobbled streets outside Newgate Prison, the common and desperate of London gather regularly to enjoy the spectacle of human necks broken at the end of a hangman's rope. For Rider Sandman, newly returned from the Napoleonic Wars, it is not grim entertainment that draws him here, but a mission to prove the guilt or innocence of a condemned prisoner -- a duty that leads Sandman from the hellish bowels of Newgate to the scented drawing rooms of...