Even great love does not necessarily overcome a difference of morals - although the young hero is very much in love, he still rejects the comfortable and easy existence he could lead thanks to the family of his future father-in-law. A tediously moralistic comedy, it picks up with all seriousness the morality of a socialist man who has broken forever with petty bourgeois ideas. It is therefore too contrived, nor does it succeed in elevating the tawdry story in any way. A comedy about life's little and big compromises.

A story of Karel Jaroš, an emotionally arid man, whose mother suffers from Alzheimer disease. It is not love, but the sense of duty that stops him from sending his mother to a mental institution. On the other hand, this way he can finally connect with her. And not just with her but also with his teenage son and with himself.

Loosely inspired by a real criminal court case. It took place in Prague and the Tatra Mountains between 1926 and 1928 and was later described as one of the biggest, if not the biggest, cases the pre-Munich Republic had ever seen. Nevertheless, the police and judiciary at the time failed to clarify and close the case in such a way that it would not raise legitimate questions long after the trial had ended. Even though the court handed down its verdicts, the case remained open in a way, and this is also reflected in the script, which remained faithful to the facts in its basic outline," says screenwriter Václav Šašek, author of the two-part television production The Trial of the Martyn Murderers...

Nineteen-year-old Pavel Kříž spends all his free time in Prague's arcades, bistros and discos with a group of thieves called Roby. Pavel has a high school diploma, but works as a window cleaner, and a large part of his income comes from the scams, scams and thefts of Roby's crew, to whom he supplies guaranteed tips. So he's not too happy when the cleaning manager assigns him a young temp, Jana Hálková. Although the girl makes no secret of her distaste for Pavel's way of life, a fragile emotional bond develops between them. But this cannot last in the environment in which Pavel moves. The young man gets into more and more trouble - part of Roby's party is caught by the police and he cannot find the money to pay back the debt. The situation escalates when a group of thieves kidnap Jana...

The two heroes of the film's story - the decent but dry engineer Zárub and the marriage swindler Majer - are granted this wish by the mysterious forces of the moon. The two men change their appearance, which, however, contrasts sharply with their unchanged characters and voices. The incomprehensible swap naturally becomes the source of many comic plots and situations.