Paris, France, 1942, during the Nazi occupation. Robert Klein, a successful art dealer who benefits from the misfortunes of those who are ruthlessly persecuted, discovers by chance that there is another Robert Klein, apparently a Jewish man; someone with whom he could be mistakenly identified, something dangerous in such harsh times.
Alain Delon
as Mr. Robert Klein
Jeanne Moreau
as Florence Klein
Francine Bergé
as Nicole
Juliet Berto
as Jeanine
Jean Bouise
as Seller
Suzanne Flon
as Doorwoman
Massimo Girotti
as Charles
Michael Lonsdale
as Pierre
Michel Aumont
as Jew Affairs Section Official
Roland Bertin
as Newspaper Director
Jean Champion
as Diener
Etienne Chicot
as Policeman
