Commissioner Montalbano investigates the murder of Carmelo Catalanotti usurer and fervent and original theater artist, soul and founder of Trinacriarte, a very active amateur theater company from Vigàta, of which he was the guru. A guru who knew how to be brilliant, but also cruel and sadistic, so much so that Montalbano realizes that it is precisely in his conception of tragic art and his very personal and disturbing method that the solution of the mystery of his death must be sought. But it is above all in his private sphere that the Commissioner must clarify and that he sees him overwhelmed by the passion for a young colleague (thetvdb.com)