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.
Adel Productions, Lira Films
French
Alain Delon
Mr. Robert Klein
Jeanne Moreau
Florence
Francine Bergé
Nicole
Juliet Berto
Jeanine, Robert's mistress
Jean Bouise
Seller of the painting
Suzanne Flon
Concierge of rue des Abbesses
Massimo Girotti
Charles, Florence's husband
Michael Lonsdale
Pierre
Michel Aumont
Jew Affairs Section Official
Roland Bertin
Newspaper Director
Jean Champion
Morgue keeper
Etienne Chicot
Policeman