Social conflicts are in full swing. Adrien Colbart (Bernard Blier), president of the powerful CGI, is considered a union leader with a radical tendency. His nephew, Benoît Lepape (Jean Yanne) is a quiet man, who works as a financial analyst in an industrial group. Contrary to what his uncle thinks, he is not hostile to the workers. On the other hand, he sees the demonstrations and the banners as "antics". After an unfortunate initiative, Lepape was fired by his CEO in a wheelchair, Chouras. He goes to see his uncle and explains his strategy to him: "against capitalism, use capitalism". He convinces him to invest the union funds in a successful bicycle business. With the same funds and the profits from the bicycles, Lepape soon opened a model electronics factory.