Having used his mastery of disguise and surveillance to nab some of France's most notorious criminals, early nineteenth-century detective Vidocq teams up with obscure medical student Hector to track down the most challenging adversary of his career, a case with ties to the missing son of Marie Antoinette.

The acclaimed author of Mr. Timothy and The Pale Blue Eye has constructed another spellbinding historical mystery about a real-life convict who transformed himself into the world's first modern detective.