Writer Joanna and real estate agent Michael have been married for four years and live in a modest apartment in New York. When Joanna accompanies Michael to a party, she is worried to find him deep in conversation with his beautiful colleague, Laura. Joanna is frightened that Michael might be cheating on her and she confronts him about it. Michael assures his wife that he isn't and the couple reconcile.
However, Michael goes away to Philadelphia on a business trip with Laura and a mutual colleague, Andy, something that Joanna isn't too keen about. But while out and about in Manhattan, she runs into an old flame, Alex, who lives in Paris and whom Joanna had an affair with four years ago that she has never told her husband about.
While spending time with Alex, Joanna begins to wonder if she made the right choice when she broke things off with Alex in favour of her husband, while Michael is tempted by thoughts of infidelity while away from his wife.
Directed by: Massy Tadjedin
Starring: Keira Knightley, Sam Worthington, Eva Mendes, Guillaume Canet, Stephanie Romanov, Griffin Dunne, Scott Adsit, Anson Mount and Daniel Eric Gold.