Overview

The 1960s. Lidia Sergeyevna is a housewife; her husband, Georgy Vasilyevich, is a design engineer; their son, Slava, is a student of rocket engineering; and their daughter, Tanya, is a beautiful and intelligent young woman. Lidia is preparing to celebrate her birthday within the intimate family circle—just as they have done for many, many years. However, her plans are upended when her son, Slava, arrives accompanied by a pleasant young woman named Zoya—and proceeds to propose to her right there during the family celebration. Lidia immediately senses that the girl is rather simple and does not belong to their social circle. Before long, the sweet Zoya transforms into a true villainess—one whom it proves impossible to get rid of.