Events unfold 30 years after the events of the movie "Enjoy Your Bath". The plot is as follows: Zhenya and Nadya did not get married, and each returned to his own life - Nadya to Ippolit, and Zhenya to Galya. The main characters in the new film are the son of Zhenya and Galya - Kostya, and the daughter of Nadya and Ippolit - also Nadya. On New Year's Eve, Kostya Lukashin returns from a medical conference from St. Petersburg to Moscow, having thoroughly drunk, Kostya thinks that he is already in Moscow.