Cest la vie 1990 Summer 1958 Frederique and Sophie go on vacation as they do every year to La Baule, where they find their uncle, Leon, nice and loud mouth, their aunt Bella, pregnant, and their little cousins Like every year Not quite This year, Lena, their mother, is still staying in Lyon for mysterious reasons If Sophies six year olds dont pay attention any more, Frederiques thirteen year old noticed a discomfort between Mom and Dad In fact, nothing is going well Lena can no longer support life with Michel, her husband, and is in love with a young artist, Jean Claude He comes to join Lena as soon as she arrives and finds her every evening on the beach, in her tent The smoldering crisis does not prevent children from doing stupid things setting fire to the Mickey Club, poisoning goldfish with suppositories, nor from experiencing their first emotional emotions One day, Michel arrives Things are going very badly, and Frederique is forced to intervene to separate him from his mother Lena then announces her decision to divorce the children Michel will try to convince her one last time, but in vain At the end of the holidays, Lena and the two little girls do not return to Lyon