The western front 1915. As the war drags into its second year, Charlie and Arthur Green find themselves in the thick of the fighting raging through Flanders. After Arthur haplessly finds himself accused of treachery and cowardice, he desperately tries to prove himself on the battlefield. But with enemies on both sides of the barbed wire, will Arthur's gallantry be enough to convince his brother? Based around actual events, and inspired by the real Arthur Green's letters home, When Brothers Fight depicts gruesome battle scenes and describes the appalling life in the trenches endured by those who lived through it.