Kristya is found dead. Demidov tries to get the truth from her younger brother and suddenly plunges into painful memories of his childhood, and Zimin suspects he has cancer.

In a small taiga town, a little girl from a dysfunctional family disappears. Investigator Demidov senses something is wrong and plunges headlong into the investigation. He also has a tense situation at home: both daughters are going through a difficult teenage period and dislike their father's new wife.