A commercial airliner suddenly reappears after being missing for five years. As those aboard reintegrate into society, they experience guiding voices and visions of events yet to occur, and soon a deeper mystery unfolds.
When a mysterious plane crash-lands in Denver, the passengers emerge with no memory of who they are, where they came from, or why they’re here. A young social worker and a novice Homeland Security agent team up with the new arrivals in an attempt to stop a humanity-ending catastrophe, discovering along the way that they are all part of the very puzzle they’re trying to solve.