Harold R. Peat tries to enlist in the United States army so that he may fight in World War I but is rejected by the recruiting officer. He is despondent until he and his friend, Old Bill, concoct a scheme whereby they are both accepted. After a stint in training camp, Harry bids his sweetheart Mary goodbye and accompanies Bill to France. Following several adventures at the front, Bill is killed and Harold, in trying to save a load of ammunition, is wounded. Harold spends some time in a French hospital, after which Mary comes to France to bring her heroic private home.