In the hands of the antiquarian Kirill Rovny, who lives in our time, “as part of his work,” an ancient document falls into the hands of the knight Philippe de Lalaine from the 15th century. This begins a series of dizzying adventures, in which there was also a place for horror. both mysticism and historical detective work. The antiquarian is studying the manuscript, and mysterious and sometimes downright creepy things are happening in the city: his friend dies, headless dead people come to life, the streets are filled with crowds of zombies. II seems like it. that the main target of the evil spirits is Kirill. Together with a small company of interested people, he decides to undertake his own investigation and sets off on a very unusual and risky expedition. And somewhere in the past, in the Burgundian town of Saint-Clair-on-Oise, something strange is also happening - they stop listening to news from there, and everyone messengers sent to the city disappear. Knight de Lalen, along with a small army, is sent to dangerous lands to figure out what’s going on. Two storylines will inevitably converge into one to reveal the secret of the disappeared city.