Sergei Ivanovich lives in a civil marriage with the beautiful Svetlana. Her mother comes to her from the Ural hinterland. Antonina Petrovna travels to the capital to finally arrange her daughter's personal life. She is not at all satisfied with the fact that Sergey and Svetlana live without signing. With the arrival of dear mother, life ceases to seem ordinary and insipid. The mother-in-law is trying to transfer all her village habits to metropolitan life ...