Svetlana goes in search of her adopted daughter, who went to look for her real parents and disappeared. At the same time, in this resort town, a thirteen—year-old girl shoots her sleeping family - mother, father and grandmother, after which she tries to hang herself. A neighbor comes running to the shots and pulls the girl out of the loop. The head of the district police entrusts the investigation of a high-profile case to investigator Elvira Barayeva. But how are Svetlana, a St. Petersburg judge with a dark past, and her adopted daughter Kira connected with this case and this place?