L'annulaire
When she is slightly hurt in the factory where she works, Iris quits her job and finds a new one as an assistant in a laboratory of a very peculiar kind. Without fully grasping what is at play around her, she gradually engages in a disturbing love affair with her enigmatic employer.
Starring Olga Kurylenko, Marc Barbé, Stipe Erceg, Edith Scob, Hanns Zischler, Sotigui Kouyaté, Doria Achour, Anne Benoît, Louis Dewynter, Anne Fassio
Watch "L'annulaire" on Amazon released in 2005. It's a comedy and drama movie, and has a rating of 6.1 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.