The parents of twins Petr and Pavel are leaving for Afghanistan to build a dam. They entrust their offspring to their uncle Podlipný in Gottwaldov. The boys soon make friends with their new classmates. They are a little envious of their uncle, the pilot, because almost the entire class is interested in airplanes and attends a model-making club. Here, under the guidance of instructor Dáša, they build a model of an OK 12 airplane, with which they want to participate in a competition. The children assume that both Prague boys are also good at model-making. Petr and Pavel are ashamed to admit that they know nothing about this activity. To save their reputation, they decide to secretly learn it themselves.

The 50th anniversary of the Barrandov studios was celebrated with a spectacular show: many directors and other important people gathered in the expensive decorations of the Variety Theatre auditorium (built for the Circus Humberto series). They smiled and showed well-deserved relaxation after a job well done in managing socialist cinema. Vladimir Sís interspersed this with excerpts from films, mainly his own and also a little of others who had worked on the "Hill of Dreams".