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.

It is the summer of 1968 and also in South Moravian Pálavice appear political clashes. The so far peacefully farming Unified farmers' cooperative starts splitting. Some of the farmers have found the cooperative called Vidrupa and want to deal with wine in private trade. Michal Janák, chairman of the farmers' cooperative is a deliberate man and refuses the latent return to the capitalism. As an excellent farmer he continues preparing planting out new vineyards. His adversaries do not agree - the returns will come many years later. Jozka Hrdlicka, an émigré, notices on the Austrian TV the interview with the representatives of Vidrupa and decides to visit his native village. The new suit and the hired car transform the bankrupt and criminal to the successful businessman with wine.