Marion Cotillard plays Sandra, a mother of two who has taken time off from her job in a factory due to depression. While away, the bosses make her 16 colleagues decide between receiving a €1,000 bonus each, or allowing Sandra to keep her job. They choose the bonus and Sandra hears about this and persuades the bosses to hold another vote, giving her two days and one night to persuade her colleagues to vote differently that she may keep her job. Her interactions with these colleagues make up this lovely film with an unexpected ending.
Cotilliard's performance is just wonderful. I was totally engrossed in Sandra's struggle.
If you are lucky enough to see a lot of films, I would certainly recommend you add this to the list but otherwise it's one you can file away for a movie night at home some time.
Trailer here and a five star review from The Guardian here. It goes for 95 minutes and is in French with English subtitles.