Pete answers the door one morning to a parent's worst nightmare. Miles breaks the news that Pete's two-year-old, isn't his child after all - switched with his baby at birth by an understaffed hospital. They agree that, rather than swap the children back, it's better to stay as they are but involve the other family in their children's lives. But an official investigation unearths some disturbing questions about just what happened on the day the babies were switched. From the author of "The Perfect Wife"