This is also known as "A Grand Affair ".
The movie did nothing for me, though I enjoyed the glorious settings in Europe (especially Italy) and the stunning architecture. The era is WWII, the story portraying miserable, dislikable characters. We have the Don Juan scenario of Jonathan Rhys-Myers' character, Solal (a high level exec at the then League of Nations in Geneva) seducing his subordinate Adrien's wife Ariane (Natalia Vodianova). Ariane succumbs willingly after a couple of meetings, Adrien is kicked into professional obscurity and the other two embark on their journey of passion.
Then follows scene after scene of sex, fighting, self-introspection, more fighting, more sex. Solal, who - despite his self-assurance as an experienced seducer - seems unsure of himself, fixating on Ariane's past lovers and getting violent; she walks away, comes back (to more sex and introspection). And thus it goes.
Other viewers will no doubt find deeper meaning here, but really how much sex does one need to get it across? The backdrops, costumes, buildings are lovely to behold but ultimately cannot carry the story on their own. One has to be invested in the characters, and I wasn't.