In Donato Carrizi's novel Maestro of Shadows, Sandra Vega, a crime photographer, and Marcus, a priest investigating crimes that only those who accept confession know about, act again. Five centuries ago, Pope Leo X issued a mysterious bull, according to which the Eternal City "never, never, never" should not be plunged into darkness. But nowadays, a storm has disabled one of the Roman power plants, and in order to fully restore power supply, the capital will have to plunge into darkness for twenty-four hours. In the coming dusk, the hidden evil comes to life. No one is insured, even those who have locked the doors for two turns. A chain of murders stretches through the city, but who is the mysterious executioner, who presses the hidden springs. Marcus and Sandra have to discover the source of the evil before it's too late...