1978, France. Young recruits are secretly digging an underground tunnel to get to the boarding school for girls, located in front of their barracks. Sexual girls are digging a tunnel towards...

Wednesday is the day when children are not in school and stay at home. It is also the day when the parents are not there. In Nantes, in the spring, twenty or so carefree and boisterous kids between the ages of three and eleven take advantage of this day to make their parents go crazy. Emma, 9 years old and naturally romantic, decides that Roland, the little boy she met in the street, is unhappy and persuades her friends to adopt him. Victoria spends the day with Martin Socoa, an often distant father whom she learns to love. There are also Muriel, Bruno, Colette and Henri who take off and create panic in their parents' home, while Marylin lives the founding drama of her childhood with a mother of an unreal sweetness. Throughout these little stories, we realize that the world of children has its own logic, totally different from that of adults.

The life of a Parisian photo model turns into a nightmare when the photographer with whom she used to work begins to pursue her constantly but she refuses his offers.

7 American high school girls visit Paris.

Doctor Valois has invented the "flashage", a cure for depressed people. After having tested it on monkeys, he tries with a first human patient, Alain Durieux. This is great success, everybody's happy except may be Alain's wife, Jeanne, who's worrying about the changes in Alain's personality. Other patients use the treatment with similar successes, and Valois's happy about it. But the monkeys are changing: non-cured ones are made mad by the over-stability and stereotyped behaviour of the cured ones. So are the humans. When Valois realises he can't stop the process, he decides to "flash" himself.

A few years after their last stay, Manon, a Parisian teenager, and her parents, Christian and Jeanne, go back down to their village of origin to spend the holidays there. Manon finds Éva and Léonie, Christian finds a bar and his old friends.

On a leave from the army, Cri-Cri gets with his friends and stumbles upon a hamlet of beautiful girls.

The sequel of a successful French comedy "Rookies Run Amok" (1971) again with "Les Charlots" group.

François, a miserable football player, becomes a town hero after bringing victory in an extremely important game. He uses his fame for revenge on the team star for the previous mockeries.