For a group of four New York friends, the past decade has been largely defined by marriage and motherhood. Educated and reared to believe that they would conquer the world, they then left prestigious jobs to stay home with their babies. What was meant to be a temporary leave of absence has lasted a decade. Now, at age forty, with the halcyon days of young motherhood behind them and without professions to define them, Amy, Jill, Roberta, and Karen face a life that is not what they were brought up to expect but seems to be the one they have chosen. But when Amy meets someone who seems to have fulfilled the classic women's dream of having it all—work, love, family—without having to give anything up, a lifetime's worth of concerns, both practical and existential, opens up. As her obsession with this woman's bustling life grows, it forces the four friends to confront the choices they've made—until a series of startling events shatters the peace and, for some of them, changes the landscape entirely.