Boris drives Olya out of the house, she goes to Ksyusha. A friend sends Matvey to meet her, and she goes to important talks with the Chinese. Vlad appears at the table as an interpreter, wondering why Ksenia did not tell him about her daughter. Then they walk, and the man tells her that he never got married because he couldn't meet a better woman. He offers to try again, Ksyusha just laughs in response. She thanks her for the lesson of youth, without which she would not have become herself, and asks her not to seek out meetings with her anymore.
Masha goes to the clinic where Artyom is being treated, finds him to talk, but the man continues to avoid her. When they finally manage to talk, Artyom indicates that 20 years ago they might have been happy, but now they are different on a molecular level. Later, he gives her advice on the process of returning ownership of the deceased mother's apartment. In the process, their meeting changes format and Masha's legs fail as a result of their meeting. She goes to the hospital, where she finds out about her pregnancy. Artyom is happy with this news, they decide to start a new life from now on.
Gosha decides to arrange a surprise and comes to Ksenia's house. She continues to lie, saying that she is temporarily staying with a friend, and offers to go to him. There she is going to tell the truth, but their conversation is interrupted by the unexpected appearance of Gosha's ex-wife in the apartment. Realizing that Gosha does not want to exchange apartments yet, Ksenia prefers to leave. Meanwhile, the professor asks Olga to return home and gives her a ring with an offer to become his wife, she agrees.
Vlad finds an approach to his daughter, she goes with him to walk in the places of youth. Gosha sells the apartment and offers Ksenia to go with him to a guest house on Valdai. She agrees, and when she comes to pack her things, she finds her daughter and Vlad in her apartment. He stays for dinner and tells his rival the truth about Ksenia, which is why Gosha leaves the house.…

Twenty years later. Ksenia is a successful owner of a large clothing brand, raising two children alone and accepting the courtship of married Alexei. Olya continues to live with Boris and all his children. Masha arrives in Moscow, where Bill informs her by phone that he has filed for divorce.
The friends meet at the disco. Olya refuses to leave the dance floor, so Ksyusha asks her son Matvey to take her friend home. Masha and Masha take the subway home, where Gosha, a rock climber, meets her, claiming that he is her future husband. They get off at the station without having had time to exchange phone numbers.
Olga wakes up in Matvey's apartment, embarrassedly gets ready and goes to her family, where Boris laments about her absence from home. The next day, she asks Matvey to forget and not tell anyone about their affair. To which he claims that there was nothing between them, even though he likes her very much. Meanwhile, Gosha finds Ksyusha online and invites her on a date to the climbing wall. Then they go to Cheburechnaya, where they accidentally meet with his friends. Under the screen of Gosha's birthday, they tell Ksyusha the facts about him. Masha, after the wake of her mother, goes to Artyom. Her appearance comes as a big surprise to him.

Ksyusha and her son run away from their tyrant husband and stay the night at Bill's place. At the same time, the girl does a pregnancy test, it turns out to be positive. Olya anonymously informs the professor about the betrayal of her lover, after which she supports the man she loves in every possible way. Masha realizes that Bill is going to propose to her, calls Artyom to hear words of love from him. The conversation comes to a dead end, so the girl accepts the ring from the foreigner.
Ksyusha decides to tell Vlad about his son, he pretends that this does not bother him. Moreover, at her friend's engagement, he offers Ksyusha to become his wife, for which he gets a slap in the face from her husband. So Vlad discovers the truth about Ksyusha, he abruptly goes home to think. Olya spends the night with the professor, and in the morning asks him to leave, not intending to be just a lover. Masha comes to Artyom at the same time, and in the heat of a heated argument they kiss again.
Ksyusha tells her friends about the pregnancy, they advise her to give birth and promise to help her with the baby. Masha goes to Vlad's mother, explains the situation and asks to talk to Vlad. The guy comes to Ksyusha at work, offers money for an abortion. The girl is upset, pretending that she was joking about the pregnancy. Meanwhile, after talking to his mother, Masha reproaches Artyom for his lifestyle and thinking. He listens to her and drives her away.
The professor tells Olga that he told his wife about them and is getting a divorce. They start living together. Masha flies abroad with Bill, and Ksyusha gives birth to a child and continues to combine motherhood with work and study.

Ksyusha is worried that Vlad hasn't called for a week. Olya tries to cheer up her friend, suggesting that something could have happened to him. The professor leaves Olya in the office so that she can cover for his wife on the phone, but Boris Alekseevich's wife comes to work for him. We find out that there was nothing between them and Olga, the girl is being reprimanded on the subject of her husband's constant infidelities.
Masha gathers her things and leaves her mother's apartment, waiting for Bill at the hotel, but he is offended by her. The girl has to return to her friends' apartment, realizes that Artyom is also offended by her, but soon her manipulations work.
Olya admits that she has fallen in love with the professor, and Ksyusha calls Vlad to put all the points in their communication. The guy talks about the operation and asks for a meeting so that he has the opportunity to explain himself to her. She agrees and goes with Vlad to the play. Vlad's mother unexpectedly joins them. Ksyusha continues to adhere to the legend that she is the daughter of diplomat Lavrov. That evening, Bill comes to reconcile with Masha, confesses his love and offers to go abroad with him. And her husband Igor comes to Ksyusha, scares her with his rude attitude again...

The professor advises Olya to give up her desire to become a surgeon and return home to Smolensk. The girl gets very upset, after which Boris Alekseevich spends time with her in the glass room talking. At the end of the day, he asks Olya to explain herself to his wife so that she doesn't swear too much. Meanwhile, Masha goes with Artyom to restructure the ancient war, where Vlad finds her and asks her to tell him Ksusha's phone number. She picks up Matvey and takes the bus home.
After learning about her friend's departure, Olya and Masha start chasing after her, because they want to protect her from communicating with her tyrannical husband. They manage to catch up with the bus on the route and persuade Ksusha to stay, especially since Vlad was looking for a meeting with her. Masha insists on calling Vlad, who invites Ksyusha to a concert at the Olympic. But the girl is not going to go there, because there is no outfit. Masha solves this issue by taking advantage of Bill's sympathy.
Artyom prepares a surprise for Masha, she completely devalues it. Olya chases her away, calling her ungrateful. The girl returns to her mother's apartment, where she realizes that she is not welcome there. After the concert, Ksyusha spends the night with Vlad.

In 2003, life in Moscow was in full swing: the Star Factory, nightclubs, even McDonald's. Only Ksyusha's life is going downhill — they didn't accept her to university, her money was stolen, her home was lost, and she had a little son in her arms. But it is at this difficult moment that she meets two friends — the cheeky Masha and the quiet Olya. Each of them is also going through difficult times, and the girls decide to stick together. A new life begins: job search, attempts to get settled in the capital and the first steps towards a dream. But there are more challenges ahead. Ksyusha is helped by friendship and love, because she meets the charming Vlad.