Kit, a troubled girl, is sent to the exclusive Blackwood boarding school, where she discovers that only four other female students have been admitted to learn the four pillars of knowledge under the ominous wing of the mysterious headmistress Madame Duret.

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.