Katia Belyavskaya is educated in England in a prestigious educational institution. Katya has a very trusting and loving relationship with her father. However, what happened at the jubilee banquet shocked Katya to the depths of her soul. A certain lady named Nadezhda appeared on the festival and stated that she had a daughter from Sergei. Sergei himself can hardly remember Nadezhda, who he apparently had a short affair with while at a resort, and is only now learning about their daughter. Katya is upset and shocked by what she heard. So she has an unknown sister named Dasha.Sergei has reason to believe that all this is lies and fiction to get his money. Sergei Belyavsky is a wealthy man, why not snatch a piece from the pie. But the surprises did not end there. With the advent of Dasha, many things will change in the life of the Belyavsky family. Especially Katya's personal life.