Kaspar Len returns home after three years in the army. He vainly searches for the mason Kryštof’s family where he had lived before he left. All he finds out is that Kryštof’s daughter Márynka, who was in his thoughts all those years, is now working in the local brothel. He goes to visit her and Márynka tells him of the misfortunes which befell her family.

The Pioneers are leaving for a holiday camp for young astronomers. And it's going to be an interesting stay, as a large meteorite was observed falling shortly beforehand, and it looks like debris fell into the area around the campground.

Summer 1968: The crisis is reaching its peak. The director of the Prague taxi service, Mudroch, rejects the drivers' absurd demands for a pay increase. The taxi drivers decide to go on strike and seek support against Murdoch from trade unionists and enemies of the regime. The director is convinced that honest communists like him cannot be defeated. However, hateful vandals damage the brakes in his car...