A novel by Michel De Saint Pierre was the source for Les Aristocrates. Pierre Fresnay stars an aging Marquis, who tries his best to uphold the traditions of nobility in an ever-changing world. The Marquis' children prefer the trappings of modern society and pop culture and regard their father as a relic. This cultural clash nearly results in tragedy when two of the Marquis' offspring substitute recklessness for common sense.

Pierre Fresnayas Marquis de Maubrun et maire
Brigitte Auberas Daisy de Maubrun
Jacques Dacqmineas Arthus de Maubrun, fils aîné du marquis
Georges Descrièresas Philippe de Maubrun, abbé, troisième fils du marquis
François Guérinas Pierre de Maubrun, quatrième fils du marquis
Léo Joannonas Le prince de Conti, le voisin « nouveau riche »