The movie is about a married couple who decide to celebrate their 30th anniversary by going to Paris, where they spent their honeymoon. Nothing spectacular so far, except that they seem to feel differently about the stage they are in, and their relationship.
Although Nick feels that she is the only one he could love, Meg may be on the brink of asking for a divorce since she feels there is more than "THE one" in one's life. To quote her, "love dies only if you kill it", while Nick honestly states that "love is the only interesting thing, far more difficult to do than sex".
However, they do meet somewhere in the middle (on a Parisian bridge, maybe) to realize that the love between them is stronger than any whim or even resentment they may have. As The Telegraph put it, it is simply "sophisticated, sharp and funny". Is there anything else to ask for in a movie? Maybe that it be set in Paris? Checked :)
