The 11th investigation of Nicolas Le FlochIn 1783 the eruption of a massive volcano in Iceland provokes significant climatic changes. Earth begins to tremble with earthquakes, fierce storms develop... weakening all of Europe and France in particular. The French realm begins to decline, its coffers empty.
Nicolas is summoned by the Queen to investigate the violent death of one of his friends: the Vicomte of Trabou, a man well-known in financial circles who has always been mysterious. Was he trying to cover up an affair of counterfeit money? Do the ends justify any means of fixing the enormous deficit of the royal treasury?
Nicolas' investigation will take him once again to England and bring him in contact with two high ranking personalities: le Comte de Cagliostro and the Countess de la Motte. Both at the heart of important financial affairs.