1982. Professor Matvey Piotrovsky and his grandson Pasha launch a time machine. As a result, their apartment is divided in two, and one of the halves is transferred to 2020, where unsuspecting Sergey and his wife Sveta live.
Kristina asks Zhorik to return the smartphone he forgot. In the 82nd year, Sveta is looking for the origins of a bad relationship with her mother Lyudmila.
In order to ensure a well-fed life, Pavel comes up with a way to make friends with Pasha and the future oligarch Gokhman in 1982, in order to enjoy the fruits of this friendship in 2020.