1916. Tommy and Michael's regiments face one another on opposite sides of the Somme battlefield. The war reaches a stalemate, although both sides are fighting harder than ever. Despite this, the men’s hearts are elsewhere, and while Michael can only dream of his wife back home, the lads arrange for lovelorn Tommy to spend time at the hospital with Joanna. Back in the trenches, British and German troops gather at the Somme – and as the shelling begins, Michael’s hopes of getting out of there alive secretly dwindle.