In a small and not very wealthy kingdom, there is one huge concern at the castle. The queen wants to marry off her adult son, Prince Emilian, at any cost. She has chosen the best bride for him, the noble and wealthy Princess Leonia. However, the future king of the country complicates this plan when he falls in love with the poor but clever and kind Stázička, the daughter of the local shoemaker Dratvička. He is not only a skilled craftsman, but also a clever practical man, and he shows not only the prince and queen, but also all the other conceited people, that the beauty of the human soul cannot be measured only by wealth and luxury.

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.