Spying as he serenades Cardinal Fabiani and his guests, Tito peers into the dark mirror of Roman politics. Pope Clement XII is sinking fast, and two candidates emerge as leading contenders for St. Peter's throne. Will Fabiani support the highborn Venetian whose secret passion is tinkering with electrical experiments? Or the humble cardinal with the gift of healing and a mysterious past?
The discovery of a beautiful corpse in Fabiani's garden complicates Tito's mission. Fabiani believes that a member of his household killed the young maid in a fit of madness, but Tito follows clues that indicate a more complex motive, assisted by his irrepressible manservant Benito and Englishman Gussie Rumbolt. From the heights of the Janiculum Hill to the muddy waters of the Tiber, from a cozy Trastevere cookshop to the chilly corridors of the Quirinal Palace, the trio wrestles with events that could change the course of history. Can Tito stop the killer and affect the election before Pope Clement takes his last breath? Or will Alessandro face the scaffold?