Tanya is finally going to get married, even the fact that the groom does not want children does not stop her. But we have to forget about the wedding and urgently fly from Siberia to our homeland - to the city of Watermelons. The reason is terrible: the wife of Tanya's wayward brother Natasha died in a car accident. Four-year-old Polina was left without a mother, and her father had not been in Arbuzov for several years. So, except for Tanya, no one needs a child. The groom immediately says that he will leave if Tanya brings Polina. But what choice does Tanya have? She will not give her niece to an orphanage. But first you need to find the girl - no one has seen her since the accident.