For the first time, the Ivanovs undertake to solve a murder that has not yet happened - at the reception, Darina sees that the son of Vera Konstantinovna, a new client, is facing death. Together they try to prevent a crime and find a potential killer. Meanwhile, in the house of the Ivanovs themselves, Tamara Petrovna is also trying to prevent a crime - Valera's betrayal. She is sure that the son-in-law has found someone on the side and is going to leave with a new chosen one on a romantic trip...

Sergei lost his daughter and now blames himself for her death - on the eve of the tragedy they had a big fight, and the next morning she was found falling from the bridge. However, the Ivanovs find out that this is not suicide at all: someone pushed Sergei's daughter. Investigating the murder, the Ivanovs find out that the girl secretly met with a local hooligan from her father. But was he responsible for her death? Meanwhile, Katya Ivanova also had a secret from her parents: Darina and Valera forbade her to have a pet, and Katya decided to act on the sly. The same thought came to Tamara Petrovna: on the sly, she decided to make and pour Valera and Darina a potion that would make them fall in love with pets. That's just that both Katya and Grandma didn't go according to plan...