In New York City, Isabel, a photographer, is having second thoughts about her upcoming marriage to Jonathan, a lawyer. On the same day, Isabel's mother Diana learns that her husband has a new lover, and begins to re-think her life choices and her open marriage. Diana and Isabel's paths cross with Alec, a young actor, and with Peter, a journalist. As the interrelated stories proceed, the connections between the lives of the five characters begin to reveal themselves--and their stories unravel so that Isabel, Jonathan, Diana, Alec, and Peter must choose what kind of lives they will lead before the sun comes up on the next day.