Ondřej (Jiří Macháček), a timid and reserved man, is in a monotonous marriage with Alice (Petra Hřebíčková). On the contrary, his promiscuous father-in-law Rudolf (Bolek Polívka) who lives next door has a happy marriage of 35 years with Marta (Simona Stašová). As Ondřej's marriage gets increasingly boring, Rudolf encourages Ondřej to imitate him to save his marriage. Ondřej rejects it but he changes his mind after he meets Šarlota (Vica Kerekes), a new date of Rudolf.