Andrej, a programmer, is developing his smart house project. To perfect his program, he moved with his wife Zuzana to a test house. He strives to introduce a bonus into the program - care for his wife. Suddenly someone else, someone mysterious takes control of the program. The idyll of a perfect life is replaced by a nightmare and a struggle for survival.
Milan's relationship with Dr. Eliška is developing promisingly, and when Milan finally decides to propose to her, it seems that nothing stands in the way of the wedding. Well, apart from one small "trifle" - Milan is still married to Slovakian woman Janka, Kryštof's mother, with whom he somehow forgot to divorce years ago! Apart from Milan's misgivings, there is another problem - the foursome's return to playing water polo is not going very well. There are only three left... and that's a hell of a lot... To save the group and pull his friend Jakub out of his depression, Kryštof decides to bring the aquabels to the pool with whom he wants to practice his performance. Honza is not too enthusiastic about Kryštof's plan at first, but later with the vision of rescuing a friend (and the possibility of being in the presence of beautiful aquabels) everyone starts preparing a performance called "Husband of the Hour".
For fifteen years now, the happily married Zuzana one day finds out that her husband Jiří has been having an affair with another woman for a long time. Zuzana does not hesitate and decides to visit her daughter-in-law Lenka and make her a bit unconventional proposal. Her plan is scandalous. She suggests that she share the care of Jirka and turn him into a man for a change. Lenka finally agrees and both women introduce this new way of life to Jirka. So he puts him in front of the finished thing. What seems like a perfect plan to everyone at first, that is, one week with his wife, the other with his mistress, may turn out to be a nightmare for everyone.
