The teacher Lydia Mikhailovna and her former student Zhenya are going to celebrate the New Year. Worthy men were not found, and therefore decided to celebrate the holiday together. Women dream of cooking stuffed carp, but none of them have the spirit to kill live fish, which serenely floats in the bathroom. Suddenly a doorbell rings and Lydia Mikhailovna recognizes her first love in the uninvited guest - Borya, whom they have not seen for 30 years. But Borya does not recognize Lidia Mikhailovna and takes the teacher for Zhenya's mother! Offended Lydia Mikhailovna tries to expose the guest for the door, but Zhenya decides to resurrect his former love and finds an excuse that Borya should stay: he must kill the carp ...