In the grim trenches of World War I, haunted British Lance-Corporal George burke is assigned to a remote advanced trench, dubbed ‘No Man’s Alley’. Here, soldiers live under an uneasy ceasefire with their German counterparts. But as unexplained, horrific deaths plague both sides, Burke happens upon German soldier Otto Kessler in No Man’s Land. The two form a reluctant alliance as they unravel the horrifying truth: a monstrous entity born of war’s horrors relentlessly stalks and hunts combatants. And much like the war itself, it seems to be unstoppable.