Olga brings up two children from different marriages, cares about her alcoholic father and tries to adjust her personal life. The eldest daughter Anya is studying in a vocational school, she thinks that she is the only adequate member of the family, and in her life everything will be different. The younger son Timofey, whose father returned to the first family in Azerbaijan, believes that he is already a man, although he is only 11 years old. Olga's father, Yuri Gennadievich, a former football player, drinks hard and constantly lies, which often leads to scrape. And sister Lena is trying to live at the expense of men - mostly married. Eternally saving relatives from troubles, Olga lives a strange life and rarely thinks of herself until Grisha, a young and positive driver of the “Sable” hearse, falls in love with her.

In the life of every father, sooner or later there comes a moment when his wife flies away on a well-deserved vacation, and he is left alone with his own child. It would seem – nothing complicated! Igor, Artyom and the Sauna also thought, not even suspecting which "waterfall" of adventures would cover them with their heads. Exhausted by the "charms" of fatherhood, the guys meet their old friend St. Valentine. Relieving stress over a bottle of whiskey, the guys jokingly dream of their children becoming adults as soon as possible.

Our three hapless heroes - Igor, Artyom, and Sauna - return for the third lesson from St. Valentine. This time they must learn the true value of fatherhood, but this time the kids are grown up...