Pierre Cassou, an accountant with Copy Corp, finds his colleagues increasingly unbearable. He decides to confess his difference in his own way.

A clique of four young teachers at a high school looks critically at their colleagues. To avoid falling in the same routine, they bring new ideas into the school lessons and play little games and pranks in their spare time -- sometimes get even more childish than their pupils. When they get opposition from the other teachers, they play tricks to get rid of them.