The evocation of Paris in the 1920s mingles with the rapid rise of the irresistible Caprice, a talented singer, and her tumultuous love affair with Jeff the composer. A photographer nicknamed Bagnolet, a gentle anarchist, gently monitors the activities of Caprice, who has become Lady Paname and, in the absence of morality, makes love triumph.

Honoré, a valet, has an extremely logical mind and is unable to tell a lie. This comes in very fortunate for the family he works for.

Roger, son of a farmer, wants to be a boxer, and gets his chance by filling in for a boxer's sparring partner. However, Roger does not know how to box and reads a rule book while in the ring.

Genial, bumbling Monsieur Hulot loves his top-floor apartment in a grimy corner of the city, and cannot fathom why his sister's family has moved to the suburbs. Their house is an ultra-modern nightmare, which Hulot only visits for the sake of stealing away his rambunctious young nephew. Hulot's sister, however, wants to win him over to her new way of life, and conspires to set him up with a wife and job.