Everything changes in a single moment for Dawn Edelstein. She's on a plane when the flight attendant makes an announcement: Prepare for a crash landing. She braces herself as thoughts flash through her mind. The shocking thing is, the thoughts are not of her husband but of a man she last saw fifteen years ago: Wyatt Armstrong. Dawn, miraculously, survives the crash, but so do all the doubts that have suddenly been raised. She has led a good life. Back in Boston, there is her husband, Bria