Denisov and Polina go to the city where, five years ago, the gang held Mark. However, a new surprise awaits for them there. There is a mole in Denisov's surroundings. His partner learns new facts that change the investigation. To stop Denisov, the gang make a desperate attempt, and from now on the life of somebody dear to him is at stake. In Latvia, Markus' adoptive mother Lidia learns something that will change her life.