It is the summer of 1958 when Lena (Nathalie Baye) sends her two daughters to a seaside resort. The girls, Frederique (Julie Bataille) and Sophie (Candice Lefranc) take advantage of their time away from their parents by playing practical jokes and making rascals of themselves. When Lena returns she brings a man (Vincent Lindon) with her. She hides this affair from her husband (Richard Berry) who arrives shortly until the affair becomes too obvious. Lena opts to go on with her affair, choosing her freedom regardless of the consequences. The sun-soaked memories of this tumultuous vacation are seen through the eyes of the troublemaking elder daughter in Diane Kurys' (ENTRE NOUS) bittersweet drama.
