About the book: year / During a secret investigation of brutal murders in a new hotel, the investigator accidentally discovered an intertemporal portal and ended up in Ancient Rome, where he began life as a nobody and without means to existence. Using his knowledge and skills, he adapts to his new life and becomes a successful Roman citizen, organizes a printing house and publishes the works of the Apostle Peter, helping to spread Christianity. But Nero executes Peter, simultaneously giving the order for the execution of the printer as an accomplice of Christians. The investigator escapes through the opened portal and finds himself in Ancient Rus' during the time of Prince Vasily the Dark, who is haunted by conspiracies and intrigues of his rivals. To save the prince, the officer suggests making a balloon and keeping it ready. During the tests of the ball, the main character ends up in Amsterdam, and from there, with the help of a certain Welle Zege Wulf, to Moscow, where he ridiculed the interests of modern residents of the capital. As a final test, Wulf suggested that the investigator fly to the planet Tarbagan