The first part of a loose trilogy about the travails of two orphaned siblings, thirteen-year-old Alenka and twenty-three-year-old Zbyněk, is based on the peculiar situation of a family in which the siblings must replace each other's parents. The brother would like to get married, but is prevented by his sister, who is jealous of everything around him. So he brings his girlfriend Katherine, whom he likes, to the flat as a lodger...

The second part of the free comedy cycle about the orphaned siblings Alice and Zbyněk Kučero further develops Zbyněk's relationship with Kateřina, the "lodger" from the previous comedy. After all is revealed and Alice has given her "blessing" to their relationship, she begins to consider the possibility that after Zbynek's wedding, Kate's parents will enter her life. What will they be like? A curious Alice goes "exploring" just as Zbynek starts to introduce his future mother-in-law and father-in-law...

Zbyněk and Kateřina have become husband and wife, and Alenka is a beautiful young lady. Mothers and fathers know best how difficult this period in a family's life begins. The young lady begins to discover a hitherto unknown world in which former unbearable boys turn into quite tolerable young men. However, most of them have qualities that do not seem entirely ideal to their parents. If Zbyněk is a brother with the duties of a father, then with Alenka's adulthood he stands on the threshold of worries that will really confuse him...