Fictional life of French King's personal assassin who commits six murders, his love affair, struggle with his conscience and death on the guillotine. Jean Louis Valmont, son of groom in Royal Stables, taken up and cultivated by King Louis XV. Once grown, in early career Valmont murders a duchess and a countess, both mistresses of King who get in monarch's way, later the King's son for politics, daughter-in-law to cover crime, the Queen to sexually free up the King, and the King's personal valet who annoys Louis XV. Story is also of Valmont's love for Juliette Beauvoir, a chambermaid who is...