Summer of 1942. A fierce battle begins near Stalingrad, the outcome of which will decide the fate of the whole world... Twenty-year-old sergeant Lubomir Zukh, who has not yet smelled gunpowder, left his unit in the frontline zone to say goodbye to his girlfriend.​ He was out of the unit for only three hours!​ But according to the laws of wartime, he is a deserter. And the punishment for this is one thing — execution.​ ​The sentence is too harsh, and everyone understands that. Will the flywheel of the military machine stop, will there be an order for pardon?

An Orthodox priest, a resident of a provincial town, has for many years been unable to find answers to important questions for him, tormenting and interfering with a peaceful life. Once, having unraveled the tangle of certain events, he realizes that the answer lies in a long and difficult unforgiveness.

The three not-so-lucky guys are having the most difficult, weirdest and funniest day of their lives. Meanwhile, in Moscow, a gang of Kyrgyz conspirators begins to wield, a sexist gynecologist and a feminist traumatologist come to work, a film producer is cheating on the Motherland, and clay policemen are uncovering their batons. The only question is which of these meetings will become fatal for our friends.

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...