After a biblical and historical prologue detailing the evolution of the idea of democracy through the creation of the world, the flood, the crucifixion of Christ, the discovery of America, the signing of the Declaration of Independence, and the Civil War, the present-day threat to this idea by autocratic powers is dramatized. Fritz Schmidt, a German-American steel plant owner, and his son Oscar remain loyal to the Kaiser, while son George fights for the Allies. When the American army hospital where Louisa Schmidt works as a nurse is attacked by the Germans, Oscar, now a German soldier, assaults her, not recognizing his sister in the confusion. George, recovering in the hospital, kills his brother and then returns home to find his mother and a German spy struggling for some secret papers. George kills the spy, Fritz realigns his loyalty to the American cause, and the family is reunited.