The saga surrounding Louis XIVs blue diamond is a web of intrigue, betrayal and a bizarre curse, covering three centuries. First brought back from India, it was then stolen during the French Revolution. Later, in London, another diamond appeared : slightly smaller but equally magnificent : the Hope diamond. Is the Hope a recut version of the mythical blue gem ? Through the discovery of a lead replica of Louis XIVs stone, and the contribution of cutting-edge technology, a professor at Paris National Museum of Natural History, Franois Farges, leads a unique investigationup to its final revelation.