March, 1918. C-company arrives to take its turn in the front-line trenches in northern France led by the war-weary Captain Stanhope (Sam Claflin). A German offensive is imminent, and the officers (Paul Bettany, Stephen Graham and Tom Sturridge) and their cook (Toby Jones) distract themselves in their dugout with talk of food and the lives they left behind. Stanhope, meanwhile, soaks his fear in whisky, unable to deal with his dread of the inevitable. A young officer, Raleigh (Asa Butterfield), has just arrived, fresh out of training and abuzz with the excitement of his first real posting – not least because he is to serve under Stanhope, his former school house monitor and the object of his sister’s affections. Each man is trapped, the days ticking by, the tension rising, and the attack drawing ever closer.