Mildred White becomes romantically involved with both Derwent Ainsworth and Dr. Mario Martinez while in Paris. She prefers Derwent, but when he leaves suddenly to see his dying father, Mario convinces Mildred that he has deserted her. When World War I begins, Derwent returns for Mildred, but upon learning that she is leaving Paris with Mario, he enlists in the army. Mildred discovers Mario's initial deception and joins the Red Cross to be near Derwent, who is blinded in battle and then tended to by Mildred. Unaware of the true identity of his nurse, Derwent falls in love with her, and the two are soon married. Mildred then prevails upon Mario to perform a special operation on Derwent's eyes. His vision restored, Derwent realizes that Mildred has returned to him, while Mario, after helping his former rival, dies in battle.