In third part of "Lovey-Dovey" Andrey and Marina are exchanging bodies again - but this time with their parents in law.

While investigating an ordinary homicide a group of detectives suddenly find a connection to a very first faces of USSR government.

In an ordinary industrial Soviet town, notable only for presence of a radio-telescope, people start behaving strangely, in a robotic manner, while assuming geometry-inspired aliases and organizing into a new hierarchy. The phenomenon spreads via a device of alien origin, called “the mediator”, capable of implanting extraterrestrial minds into human bodies. The aliens are bound by limitations of the terrestrial technology, having to use the means at the disposal of humans to prepare the grounds for the full-scale invasion. With “the mediator" being unable to subdue minds of children, lunatics, geniuses, and rebels, a struggle over the fate of the town and the human civilization ensues.

The film is based on the story of Anatoly Kurchatkin "House of Women". A tragicomedy about four women of three generations who lives in a tiny Moscow apartment: a sick grandmother, constantly requiring attention; a mother, very peculiar woman, who still hoping to somehow arrange her personal life; and two daughters, each of whom has a lot of problems.

The legendary commander of the Civil War, the winner of Wrangel arrives in the capital at the call of Stalin. In the capital, he is perplexed to learn that the Politburo at a special meeting decided to force him to operate on a long-standing ulcer. The attending physician is convinced that the operation is not needed, but, obeying party discipline, the old Bolshevik lies on the operating table.

Svetlana Vasilievna is a young, energetic woman who often changes jobs, accustomed to achieving the goals that she has set for herself in life. Her next desire is to marry a "creative, intelligent" person. After a lengthy search, she chose an elderly, but well-mannered, intelligent official Vladimir Dmitrievich Lobanov. Svetlana believes that with the help of connections and sober calculation, you can achieve everything: well-being, respectability, even personal happiness. She does not notice that the fulfillment of her desires does not at all make the person close to her happy. The payback turns out to be unexpected and terrible.

Doctor Nechayev lives by the concerns of his patients. This is a man of remarkable mental qualities and a highly qualified specialist in cardiology, but he is completely unadapted to life in everyday life and imperceptibly lost himself, did not do much of what he dreamed of and did not understand the selfless love of a young student Alya. The doctor gradually puts an end to his hopes and dreams – they fade into the background, supplanted by work in the hospital.

Spring of 1918. Tarakanov, managing the estate of Prince Tikhvinsky, with the help of a former court fencing teacher Marquess and a street kid Keshka, is stealing a collection of paintings and sculptures from the abandoned estate owners. Hoping to transport her abroad, criminals wander with a circus troupe, and in their wake goes a tireless criminal investigator — Makar Ovchinnikov.