Antonín Kachlík wanted to make committed films about the moral dilemmas of the working class, but in the era of normalisation, he could only proclaim how faltering individuals would eventually come to the desired thinking. This is also true of the adaptation of Jiří Švejda's book about the wavering career of a young brickmaking technologist - the simplistic drawing of characters and plots, the posterishly lifeless language and the textbook discussion of social ills are all objectionable; the ideal becomes the code of the socialist builder.

Pistolník is a teacher who rules the boys' boarding school of a vocational school with a firm hand. Room No. 135 is Pavel, Tonda, Roman, Slavek and especially Olin, nicknamed Koblih, five classmates who, with extraordinary imagination, drive Pistolník crazy with new and new Canadian pranks. Their recessions are only put to an end by the arrival of a new and young teacher, Kamila, who is not affected by their tried and tested tricks. Despite their seemingly carefree life, each of the boys has his own problems, which gradually surface, and so in the avalanche of funny moments, a serious tone is occasionally heard.

Three intertwined stories about Serbian truck driver who is involved into drug trafficking without knowing, Czech family who live by the road which makes them a lot of troubles since many cars crash into their house, and a bus full of Swedish grannies who go on a Trans-European package holiday.