As a veteran trauma surgeon, Dr. Damian DeSantos has spent his career negotiating the limbo between life and death. In a race to repair an aortic aneurysm, Damian totals his car but manages to scramble free from the wreckage and make it to the hospital in time to save a life. On his way out, however, he sees a familiar face in the emergency room: his own.

Damian is in some kind of between-life limbo, but he soon learns that the world he knew was just the tip of a much bigger iceberg. While Damian thought he was holding patients' lives in his hands, a greater battle for souls was...