Ben Matson lost someone he loved in the 9/11 attacks. Or thinks he did - no body has been recovered, and she shouldn't have been on that particular plane on that day. But he knows she was. The world has moved on from that terrible day. Nearly 20 years later, it has faded into a dull memory for most people. But a chance encounter rekindles Ben's interest in the event, and the inconsistencies that always bugged him. Then the announcement of the recovery of an unidentified plane crash sets off a chain of events that will lead Ben to question everything he thought he knew.