For the first time in many years, Nastya and her son Ivan came to the city from the village of Old Believers. They are surrounded by a strange, unusual, full of dangers and temptations world. Thanks to the case, Vanya became the only witness to the murder of a journalist who was investigating a scandalous case involving high-ranking officials. The murder case is entrusted to the principled but very capricious investigator Leshchev. Talking to the boy, he finds out that one of the murderers of the journalists is a police officer. From this moment on, the lives of Vanya, Nastya and Leshchev himself are in danger.