"Polar deer" are following the trail of the "Black Dragon" in search of a laboratory. Antonina invites Polina to celebrate Kirill's fake birthday at a local karaoke.

In order to meet with the boss of the Chinese, Vitya is forced to fulfill their condition - to take possession of Raisa's electronic signature. Tolya is waiting for Irka's return and decides to arrange a general cleaning of the apartment.

Vitya wants to explain everything to Polina, but for this he needs to sneak into his own son's birthday party. Raisa is dismissed from the post of head of the administration. Zyuzin becomes the acting mayor.