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.

The holidays began and Pepík Janousek is playing with his friend Hadraba, whose nickname is Sun. Sun has to baby-sit his small brother in a pram and envies Pepík his nice adoptive parents because his own father beats him often. Pepík is happy - he will have soon the same surname Marek as his father and mother. Pepík is shocked when Sun tells him that Mrs Marková is pregnant. He falls from a height and ends up in hospital. Despite of all expressed love and care Pepík is afraid that the Mareks will no longer want him.

A funny movie about the life of the girls from the girls choir from south Czech republic.