Howard Hawks directs this drama set amongst the trenches of World War 1. At the heart of the story is Captain La Roche (Warner Baxter), part of a French regiment on the front line of the war against the Germans. As the war goes on and La Roche is forced to order more and more men 'over the top' to their deaths, he becomes increasingly melancholy and preoccupied. His love for nurse Monique La Coste (June Lang) is a welcome distraction, though he faces a battle to win her affection with the charming Lieutenant Michel Denet (Fredric March). How will La Roche fare in both love and war?