Un jeune homme riche, a été séduit par trois femmes, une belle Anglaise, Pearl, une artiste russe, Athalia, une charmante ouvrière, Lucie. Mais, épris avant tout de liberté, il ne va à aucun de ses rendez-vous. Passionné de vitesse, il prend plutôt sa voiture de sport et fonce vers les plages de la Normandie. En route, une hirondelle en piqué le blesse mortellement.
As described in a film magazine review, after the United States declares war on Germany in 1917, American citizens within Germany like Marie Lohr (Bara), who was visiting her uncle Professor Lohr (Elkas) in Strassburg, hastily attempt to obtain passports and leave the county. However, Major von Rohn (Nye), a powerful officer in the German Army, desires her as a companion, noting that German officers in war time are permitted to have any woman that they fancy. Marie's American aviator sweetheart, Robert Stedman (Ward), has reached Switzerland, and Marie attempts to keep Von Rohn at a respectful distance. She escapes one hazardous situation when Stedman, during a mission, happens to drop a bomb on a house and apparently kills the German officer. Marie is then able to take, from a female German spy who was also in the house and crushed under the wreckage, passports and secret documents that instruct that the spy be taken through the French lines. Impersonating the spy, Marie is able to get to the German border, where she is detained by German soldiers who look to her to relieve their loneliness. Her companion from her journey is able to reach Robert, who then jumps into a airplane to rescue Marie. Marie holds off the soldiers and her identity is safe until von Rohn, recovered from his injuries, shows up at the woman's apartment where Marie is being held and where Robert is hidden in a closet. Marie stabs and kills Voh Rohn, and the two patriots escape after Robert dons the officer's uniform.
The original synopsis of the film was published in the Moving Picture World as follows: "Professor Dix has won fame as a scientist and has collected many objects of Egyptian ware, centuries old, that arouse the enthusiasm of his associates. Even Jack Thornton, an active, go-ahead young businessman, is interested in the professor's home, but although he tries to pretend it is Egyptology which interests him, the professor's fair young daughter is really the lodestone. Jack decides to win the old man's respect by posing as an Egyptologist himself. To start his collection, he purchases a mummy at an auction sale, and takes it home expecting that later he can make a great hit with his sweetheart's father, by presenting it to him as a gift. While the mummy is in Jack's room, a live electric wire is by accident brought in contact with it. The body has been so perfectly mummified, that the electric current is all that is necessary to ignite the vital spark, and Jack is amazed to see dancing forth from the case which he thought contained only unattractive rags and bones, a beautiful Egyptian princess. As soon as she is released, the mummy makes violent love to Jack, and causes his sweetheart to quarrel with him (for how can a plain businessman explain the presence in his room of a beautiful barbarian?). When her love is spurned, the visitor from the distant past avenges herself by having Jack made into a mummy and placed in the case in her stead. Her heart relents, however, in time to save him from being 'cut up' by the professor, who with the sharp knife, starts to investigate the contents of the mummy case. But all ends happily when Jack's plain statements of the seemingly impossible facts are proved true by the professor. Jack is reunited to his sweetheart, and the professor, being a widower, also an ardent admirer of everything antique, leads the recreated Egyptian lady to the altar, in spite of the fact that there is a difference of several thousand years in their ages.
A young man and a woman exchange glances through the windows of their passing trains. They later discover that they are staying in neighboring houses, but their respective families are feuding and they are only occasionally able to continue their romance across the garden wall. Eventually, they decide to elope together but this only leads to more trouble than it is worth.