Children disappear one after another in the city. Parents are in despair, the police are sure that they will return on their own, there are not enough volunteers for everyone. What if children are kidnapped for a specific purpose? Oksana Koshkina, nicknamed Koshka, who recently returned to the police, takes up the case. The missing children appear to be part of a larger scheme involving multiple parties. The deeper Oksana plunges into the case, the more she realizes the scale of the disaster. And the more acutely she is hurt by her own memories from the past.