The "City of Secrets" continues the story of Luciano and Arianna as Luciano goes to study at a university in Padavia (the Talian version of Padua). Another Stravagante from the modern world appears, a dyslexic but extremely intelligent young man named Matt, whose talisman happens to be a book. Transported to the Scriptorium of Padavia University, where Matt works as a printer of forbidden texts under the guidance of the Stravagante Constantin, who is known amongst the public as a professor of Rhetoric at the university.