Although she seems to succeed in reframing them regularly, the director realizes that she and her teaching team made up of her husband, her daughter and the imposing Mr. Bruce (new sports teacher) are in turn victims of new pranks by the students by way of retaliation.

During this time, Bébel will spend part of the year flirting with Caroline, Julien's girlfriend, but the latter, exasperated, successively sends her friend Ruth and the nymphomaniac Jeanne to her bed.

Exasperated by the students' lack of results, the headmistress takes new measures by installing a learning machine in the school.

The commisiare, who the gang pranked by calling him anonymously on the phone for fake bomb threats, is put in charge of watching them.

Ten years later, they have all succeeded in life: Bébel runs a cinema newspaper, Julien has become a very BCBG specialized doctor married to Caroline with whom he had eight children, Jeanne the nymphomaniac runs a dating club, Gaëtan is an inspector for the repression of fraud, Togo the African is president of his native country and Graffiti, an expert in theft of mopeds, has become the boss of a garage of luxury car.