Two young boys, play hooky from school in order to explore an ultramodern world's fair. They take in the many marvelous scientific and industrial exhibits, obtain literature, eat food, and generally run amok.
High school students experience the everyday worries of their age - they prepare for their high school graduation, go on a production internship at an engineering plant, and compete for a ski trip to the Krkonoše Mountains...
A musical starring Jiří Menzel (whose part is sung by Achilles Michailidis) as a math and physics teacher employing innovative teaching methods.