The lawyer and journalist Matteo Teresi discovers the existence of a secret sect whose members include priests, politicians, and regional VIPs. During the early morning hours, when the town’s churches are closed, the "Sect of the Angels" meets in the sacristy to carry out their holy office: initiating devout virgins into the rites of married life. Preying on their victims’ naivete, the hooded "elect" commit ignominious acts while promising the young women divine grace. In 1901, at a time of immense changes in Sicilian society, the scandal breaks nationwide.

Sicily, April 16, 1677. From his deathbed, Charles III's viceroy, don Angel de Guzmàn, marquis of Castel de Roderigo, names his wife, donna Eleonora, as his successor. Eleonora di Mora is a highly intelligent and capable woman who immediately applies her political acumen to heal the scarred soul of Palermo, a city afflicted by poverty, misery, and the frequent uprisings they entail. The marquise implements measures that include lowering the price of bread and establishing stipends for young couples wishing to marry - all considered seditious by the conservative city fathers.

Naples, 1931. A bitter wind stalks the city streets, and murder lies at its chilled heart. When Maestro Vezzi, one of the world's greatest tenors, is found brutally murdered in his dressing room at Naples' famous San Carlo theater, the enigmatic and aloof Commissario Ricciardi is called to investigate. Arrogant and bad-tempered, Vezzi was hated by many. But with the livelihoods of the opera at stake, who would have committed such a callous act?

Private investigator Dan Armstrong is no stranger to working with criminals, but when he’s approached for help by Bianca Moretti, he’s on high alert. Bianca is intelligent and beautiful, and Dan likes her, but he also once sent her to prison…Bianca explains that a guest has been found dead at her father’s luxurious and private retreat on the beautiful Italian Riviera. The police are sure the death is accidental, but Bianca is convinced the man’s been murdered. Dan’s sure he can get to the bottom of things…as long as Bianca is telling him the whole truth.

Nestled high in the Tuscan hills lies Villa Volpone, home to renowned crime writer Jonah Moore and his creative writing course. It’s also the last place retired DCI Dan Armstrong expected to spend his retirement! Dan’s no writer, but maybe this break will help him to think about the next chapter in his own life story? But only days into the course, Jonah Moore is found stabbed to death with his award-winning silver dagger! And Dan finds himself pulled out of retirement with a killer to catch.