This is a movie about the romantic awakening of an open-minded, freckle-faced ingénue named ... hold on, Milou turns out to be a gentle and wizened giant of a man, played by Michel Piccoli, who has apparently learned to live with an inappropriately cute nickname. He is living on his mother's country estate, and generally enjoying the decelerated life of landed gentry. Then his mother dies and his siblings descend on the mansion, threatening his casual existence (or maybe just questioning Milou's privilege of doing FA for a living). At the same time, the riots of 1968 are unfolding in far-away Paris.
The small group represent the different attitudes of French society at the time, we have the idealistic student who is overly anxious to see the arrival of a new world order, alongside the bourgeois reactionary who is somewhat less enthusiastic about horde of bearded baba cools putting up barricades, a housemaid who just wants to get her share of the inheritance, as well as a woman who feels impelled to take her top off for some reason. At one point, the group flee into the woods, and return the next morning. Somehow, the biggest bourgeois of all, Milou, is untouched by the quarrels around him and ends up continuing to live his placid mansion life, seemingly because he is so quaint and affable.
This movie had a few good ideas and moments, but it kind of runs out of ideas and plot after the family is assembled and their individual positions are established. In the end it's more or less a showcase for Michel Piccoli.