USSR, the beginning of the 80s. An intelligent Golubev family lives in Moscow: father - professor of Moscow State University Alexander Ivanovich, mother - trainer in rhythmic gymnastics Larisa Alekseevna, daughter - beauty and one of the best students of Moscow State University Tanya. The Golubev family is doing well. Tanya is going to marry a classmate of Cyril, parents are preparing for a significant event. But soon Tanya, as one of the best students of the course, was invited to an interview with the KGB. Tanya refuses to cooperate. She does not know that she “sunk a hook in the heart“ of the KGB major Yuri Rogov: he almost fell in love with Tanya at first sight.