Ahmet Celal, who was injured during the war, is in great pain and a young woman named Emine helps him and saves him and heals him. A stormy love breaks out in those scenes and the intrigued life of that love is worked out.
Free and easy Garrett Cope loves Katherine Gresham, but his rival, Henry Miller, who is really Heinrich Mueller, a World War I German spy, gets rid of Garrett by having him arrested for the murder of Pembroke Van Tuyl. While Garrett is in prison, Katherine marries Mueller, but Sidney Dundas, knowing that the German actually committed the crime, finally confesses, and Garrett is freed. Meanwhile, Mueller takes Katherine to a remote island called No Man's Land, which he uses as a base for blowing up Allied ships.
Young Jackie Kernwood, the daughter of the colonel commanding an army post, is bored with the routines of post life, and to break the monotony she organizes a girls' brigade, of which her father disapproves. When the colonel forces her to disband the group, she makes up her mind to run away and become a nurse in the Red Cross. Before she can do that, however, she stumbles across evidence of a spy ring headed by an officer on the post that is plotting to blow up a troop train--and it looks like the chief spy is her boyfriend, Lt. Adair.
Steve Monteith and Ezra Mason, upper class men, and Bill Bronson, a plebe, are chums and roommates at West Point before the Civil War. Steve prepares to leave for his home in Virginia, and Mason and he exchange photographs before parting. General Abner Montieth, Steve's father, and his sister Clairette are overjoyed and surprised when Steve arrives. Aunt Margie and her adopted daughter, Joan Fitzhugh, who is very fond of Steve, join the family and give Steve a warm welcome. One year later the rumble of war is heard. Steve, now a major, and his father, General, leave at the head of separate companies with the Confederate troops.
Jimmy Higgings is a worker of the plant making weapons for the Tsarist Russia and the German Empire. During World War I, Jimmy speaks at a spontaneous rally against the war. He is arrested. When released, he becomes unemployed. He is happy to hear the news about the revolution; he volunteers into the American expeditionary force thinking that having the weapons he can fight against Germans – the enemies of the Russian revolution.
However, finding himself in Russia, Jimmy soon realises that the expeditionary force of American volunteers fights not against the Germans, but against the young Socialist Russia. Without any hesitations, he takes the path of revolutionary struggle, he spreads propaganda among the American soldiers and distributes Bolshevik leaflets. Captured by the American military police, Jimmy Higgings does not betray his friends. He is sentenced to twenty years in a military prison. Jimmy cannot stand it and loses his mind…
During World War I, young Englishman Hawtrey Burke captivates New York society with his charming manner and his skill at polo, but he incurs the scorn of the woman he loves, Elinor Warden, who, having recently returned from war-torn Belgium, cannot understand why Hawtrey is not on the front lines.
Karl "Curly" Casterline, a wrongfully discharged New York City policeman, finds work on the Midwestern farm of Adolf Bauerle to help the war effort. Curly is attracted to his boss's niece, Mina, but also realizes that Adolf and his cohort, Kurz, plan to blow up a troop train. Curly kills the two saboteurs and saves the train, but he is jailed by the abusive Sheriff Herman Lindig. Although Mina praises Curly for saving the soldiers' lives, he is sentenced to death and is denied a pardon from the governor. After the case attracts national attention, the governor explains that he prolonged Curly's incarceration to draw attention to the danger of German propaganda.
Just prior to World War I, the Kaiser sends Baron von Zeller to inform Emperor Franz Josef of Austria that he is ready to declare war on France. Sensing the impending crisis, the French War Office dispatches secret agent René de Bornay to investigate the situation, and upon his arrival, he cultivates the friendship of Franz Josef's mistress, the Countess Griselda von Arenburg.
French scientists are developing a secret weapon, a gun that uses the mysterious powers of X-ray and ultra violet rays, called a "Ray Rifle." Miss Dalton played the girl that would protect it from German spies.
At a military hall in a Southern mansion the Confederate officers are amusing themselves. Captain Ford is the officer in charge and Virginia, the young hostess, is his sweetheart. At the height of their fun the sentries outside report the approach of Union soldiers. All officers hurry to their commands. At first the Confederates, having less men, attempt to outmarch the Federals. However, after a short time, they change plans and entrench themselves on the surrounding hills.
Hearing that the United States has just declared war on Germany, Bill Durham hurries to a recruiting station to enlist, but because he has flat feet, he is rejected. He falls in love with Barbara Knowles, whose guardian, August Myers, unknown to Barbara, is a German agent. When Bill learns that Myers plans to stir up trouble on the border of the United States and Mexico, he catches the train to New Mexico and routs out Myers' gang of bandits.