The Czech revival movement is divided at the end of the first half of the 19th century. While the older generation, such as František Palacký, urges restraint, students lean towards radical positions. A report on the revolutionary events in Paris prompts Czech Prague residents to write down the demands of the Czech nation for self-determination and the proclamation of a constitution. Tensions peak during the All-Slavic Congress in Prague's Žofín. Vienna rejects the Czech demands and the congress is brutally dispersed by the Austrian police. Prague begins to build barricades...

The drama from the time of the Nazi occupation begins at the train station, where a transport with German soldiers is passing. The train is stopped due to improvised sabotage by one of the railway workers. Resistance liaison Růžena Kubínová is arrested in a random raid. The cynical councilor Dönnert discovers her false documents and has her brutally interrogated. He suspects that she could contribute to exposing the entire group. He puts a informant, Herta, in her cell.

The management of the Meteor motorcycle factory is forced by a representative of the central headquarters to accept the expensive design of a racing machine and abandon the unfinished prototype of a folk motorcycle of their own design. However, the factory's workers and technical team decide to complete the prototype of the "Pepíky", as they call their five-hundred-horsepower motorcycles, ahead of schedule.