On a desolate, Midwestern county road, a bound man crawls towards a remote postal box, managing to slide a blood-stained plea-for-help message into the slot before a panicking figure closes in behind him. The note makes its way to the county post office and onto the desk of Jasper, a seasoned and skilled "dead letter" investigator, responsible for investigating lost mail and returning it to its sender. As he investigates further, Jasper meets Trent, a strange yet unassuming man who has taken up residence at the men’s home where Jasper lives. When Trent unexpectedly shows up at Jasper’s office, it becomes clear he has a vested interest in the note, and will stop at nothing to retrieve it.