Nikita Filatov is a guy who seems to be lucky. He graduated from linguistics, moved from Kyzylorda, and even got a job as a salesman in a bookstore. And unwittingly he found himself in the thick of events that took him to a new level - the witcher. But, if you don’t know how to do anything, you can resist the evil lurking in every nook and cranny of the ancient city? In St. Petersburg communal apartments located in ancient houses, there are things left there from the previous owners - those who also saw Count Cagliostro in person. Mysterious, frightening. Strange rooms that have remained closed for decades and many other things that ordinary people living nearby do not notice behind their problems and bustle. Strange events in the city where magic becomes reality. Time stops, doors to an alien world open and close.