Paris, 1942.
Robert Klein cannot find any fault with the state of affairs in German-occupied France.
He has a well-furnished flat, a mistress, and business is booming.
Jews facing discrimination because of laws edicted by the French government are desperate to sell valuable works of art - and it is easy for him to get them at bargain prices.
His cosy life is disrupted when he realizes that there is another Robert Klein in Paris - a Jew with a rather mysterious behaviour.
Very soon, this homonymy attracts the close - and menacing - attention of the police on the established art trader.
I know that I am in the minority but I found this film (1) impossible to understand and (2) all but impossible to sit through. I will not bore you with detailing the film's plot, because other reviewers have already done it and likely done it better than I could.
I always assumed director Joseph Losey was British (he was a blacklisted American). To further confuse matters (and me) 'Mr.
A strange script. fascinating cast.