The story revolves around two married suburbanites, Frank and Molly, who meet in a New York bookshop while Christmas shopping, and later encounter each other on a commuter train, first by accident, then (as their mutual attraction grows) by design. It is amazing how only a few meetings turns into obsession, and it is obviously when bad things happen to them both, and their marriages, that you wonder if they should be together. The movie examines the guilt-factor in the idea of an extra-marital fling and have us the viewers pondering, "Will they get together? Will they not? Can two happily married, reasonable upper middle class people be led by a chance encounter to abandon their goodhearted spouses and tear apart their children's home? I guess you have to watch it to find out or I can just put you out of your agony and tell you now lol.