On April 6, 1917, Lance Corporal Tom Blake and Lance Corporal William Schofield receive orders from General Erinmore to prevent Colonel Mackenzie from leading The 2nd Devons into a trap set by the Germans. The soldiers must proceed on foot into enemy territory to deliver the message, which will stop 1,600 men from walking straight into a deadly trap. Sam Mendes' war drama, starring Dean-Charles Chapman, George MacKay, Daniel Mays and Colin Firth.