The "Polar deer" are coming together again to deal the "Black Dragon" a fatal blow. Chinese Li revealed to Vita the last part of the scheme - how exactly the "Black Dragon" distributes its goods. The plan to eliminate the group is simple and reliable: Arthur must impersonate a drug dealer, meet with Xiangzhu and record the deal using a spy camera. What could possibly go wrong?

On New Year's Eve, Viti's ex-girlfriend Marina breaks into the usual life of the Polar. And with her is a young man named Max, who turns out to be Vitya's son. Tolya and Kolya decide to open a new startup craft brewery and brew beer using the "express gassing" method. And a local eco-activist has an insidious plan for the mayor of the city, Raisa Borisovna.

Polina is not very happy about the uninvited guests. Vitya is trying to find out from Marina why she decided to meet him after thirty years? Marina says that their old mutual friend named Barabula is getting out of prison. He has a number of questions for Marina and Vita. Meanwhile, Tolya and Kolya's "express-gassing" method is failing