Seva and Victor are students and best friends, though they have very different characters. Seva is a joker and ringleader, and Victor is calm and reasonable. They are used to fool around at home and at school. But one day at school they were threatened, if they do not settle down and find a distracting from their antic hobby, they won’t go to the trip with the class. The boys really want to join the campaign, so they start looking for a hobby.