As a divorce lawyer for Manhattan's elite, David Greenfield is privy to the intimate, dirty details of failed marriages. He knows he's lucky to be married to Blair--a Barnard dean and the mother of their college-age daughter, she is a woman he loves more today than he did when they tied the knot.

Then seductive photographer Jean Coin asks David to be her lover for 6 weeks, until she leaves for Timbuktu. Tempted, David reasons that "it's not cheating if your wife's there." A 1-night threesome would relieve the pressure of monogamy without wrecking their marriage. What harm could come of fulfilling his longtime sexual fantasy?