A quiet and modest man, a doctor at the Bondarenko maternity hospital knows firsthand what sons are: he has three. And they cause a lot of trouble for the doctor. The eldest son Victor, an artist, considers himself a failure. The second, Dima, having received an assignment in the Moscow region after graduation, rushes to the Arctic. The youngest, Yurka, runs away from home to "liberate" the oppressed peoples of Africa. And they all call their father Don Quixote, and he's ready for the next son ...