La música del mal

Naples, 1900. Fabio, the owner of the Dellanotte theater, leaves on a trip for a year, and entrusts his two sons: Adriano, a blind cellist, and Carlo, with the responsibility of running the opera house. But after his departure, everything will change. His children, although Carlo is married, fall in love with the same mysterious woman. His wife develops hobbies that she would not imagine. And a bloodthirsty serial killer is dedicated to killing in the theater, following the guidelines of an ancient manuscript that narrates the life of Diane, the mute maid of the poisonous Marquise de Brinvilliers, in the Paris of the Sun King. To catch him, they will receive the help from Gianni Leone, collaborator of the founder of the Italian school of criminal anthropology Abele de Blasio. He's going to use his new, but still unproven, scientific methods to do it... or isn't he?