June 1987. Lille, in the North of France. Two families live in this big town. On one hand, the "Le Quesnoy", a wealthy family. The father is the manager of "EDF", the mother stays at home and the children are well brought up. On the other hand, the "Groseille" a poor family who lives in a small flat. The father took part in the Algerian War, the mother is listless and the children are delinquents. Apparently, these two families have got nothing in common. However, twelve years ago, two children have been exchanged by a nurse who was left by her lover. They will be given back to their real families..... .....and it won't be easy. It's Etienne Chatiliez's first film and it's very successful. The description of the two families is satirical and it never falls into the caricature. The "Le Quesnoy" are never showing signs of conceit or hypocrisy, they're even a bit ridiculous. The movie is very strong thanks to its actors who are mostly incredible: of course, the main actors :Hélène Vincent won the César for the best actress in 1989. Her portrait and some of her words are irresistible (it's monday, it's raviolis). Benoit Magimel who fits well in the role of Maurice. He's smart and impish. But the minor actors too: Patrick Bouchitey in his role of ecclesiastic, (The scene in which he sings "Jésus reviens etc..." during a party is absolutely brillant and funny, Daniel Gélin, a wistful doctor and a wicked lover. At last, the screenplay is full of little details or words that score the bull's eye. The best example is when Bernadette's spreading her soup on the table during a dinner which means that she doesn't belong to her family circle. To sum up: one of the funniest movies of the eighties.