Two young girls, close friends, act as a pair with substantial mood swings caused by a split personality. On the one hand, they are ethically and morally restrained, while on the other—in stark contrast—they are sexually voracious and seek adventure with behavior bordering on nymphomania.

Jacques Marbeuf is married to Gilda and has to leave her for a month since he is to instruct Japanese girls how to fly a plane. Before going, he offers her a dildo and asks their maid Marie to take care of 'madame'. The two women, under the husband's guidance, quickly learn how to use the thing. 'Monsieur' leaves and 'Madame' meets her young and very shy neighbour on the way back from the station. His name is Jacques and he tells her his father often watches her with binoculars. The friendly woman invites him for dinner.

Monsieur Mendel, a rich businessman, has retired to Italy where he enjoys sailing. His secretary "takes care" of him so well that one day he has a heart attack. Learning that he doesn't have a long time to live, he asks Paul, his associate, to find the three daughters he has had. Paul finds the first one (Isabelle) in a sexy party in Paris. Then he finds Angelia who is a nurse in a convent in Calabra. A contact in New York finds the third one (in fact twin sisters) who are prostitutes of some sort.