About the fates of four friends: Davlyat, Naim, Haidar and Gulshan, who grew up in the same Tajik village. Their friendship is being tested by time and life circumstances.

The Chairman of the collective farm Sattar Safarov devoted many years to growing cotton. But a new time is coming, and with it another generation of cotton growers. Among them is Safarov's son, a young scientist Murad, who bred an original variety of cotton and wants to sow it in the fields of his native collective farm. Safarov does not dare to experiment. Murad quarrels with his father, but then realizes that he is right. After a while, Murad has the idea of searching for new varieties using a computer. With his friends, the teacher Yamschikov and cyberneticist Timur, Murad begins to make the first experiments…

In his early childhood, Aziz lost his father, and his mother remarried a collective farm miller, Ustozakir. The boy spent all his time at the mill, helping his stepfather, and when he grew older, he completed a driving course. After his mother's death, Ustozakir marries a young woman. When Aziz sees his mother’s jewelry on the bride, he rips it off and runs away from his stepfather's house. After getting a job as a driver, he meets Muhabbat. The young couple falls in love, but their love is hindered by the fact that, according to an old tradition, Muhabbat has been betrothed to Gaib since childhood, and he insists on marrying her. After the girl rejects his official proposal, Gaib attempts to abduct her. However, Aziz and his friends thwart his plans.