Once Zoya was a happy wife and mother, she adored her work in kindergarten and lived serenely. And then something broke, and she lost everything. For the past two years she has been undergoing treatment by a psychiatrist, during which time she has had memory lapses more than once, she even tried to commit suicide. Now she is better, but her daughter has lost the habit of her, her husband married another, and although the family still takes care of Zoya, this is no longer her family. Arriving at the dacha to the parents of her ex-husband, she feels like a stranger and useless to anyone. It is on this day that a strange burial place is found near their village: the bones of a man who died two years ago are buried under a concrete slab. The police are identifying him and interviewing local residents. No one recognizes the deceased... except for Zoya. And that same night another murder occurs. The case is being conducted by investigators Tatyana and Pavel, already familiar to us. Now they cooperate on equal terms, and it seems that their relationship has only become more complicated...
