Le Noir, Sartine`s successor as Lieutenant General of Police, distrusts Le Floch. Monsieur de Saint-Florentin, the King`s new minister, entrusts Commissioner Le Floch with the investigation into the murder of a chambermaid whose throat was cut in unusual circumstances at Saint-Florentin`s home. His inquiry takes place both in Paris & Versailles, where he secures his position alongside the King & must confront the mysteries of the Trianon & the horrors of Bicetre. This fifth exciting adventure for Nicolas Le Floch has it all: serial crimes & a bizarre murder weapon, as well as debauchery, espionage, & the follies of a young court where ancient rivalries & grudges still linger.