24 December 1916. A truck carrying mail is stopped at a German checkpoint and riddled with bullets. Inside, a man lies dead. Another man and a woman, on a postal mission, claim innocence in the death of their companion and their presence in enemy territory. The radio that had been guiding them had apparently cut out, leaving them stranded in no man’s land. And so, on Christmas Eve 1916, a cross- examination begins to uncover the real reason why enemy postmen and couriers are in the trenches.