Aimé Prado, pied-noir based in Marseille, is a very renowned restaurateur. He befriends Julien, a marginal man wanted for the accidental death of a racist cafe owner.

Gabriel Pelletier, sales manager for a major industrial firm, would be the happiest of men if he didn't have a family of rare originality. The day Gabriel Pelletier is asked by the firm's management to welcome and accommodate an important American industrialist who has come to Paris to handle a major contract, he realizes the difficulties that lie ahead. How will Mr. Strumberger, who has the reputation of a fierce puritan, react to the behavior of the various members of the family?

Two unemployed actors accept what they believe to be an acting job from a wealthy man without realizing that he needs two real private detectives.

During the events of May 1968 in France, different worldviews of conflicting relatives collide in their family estate.