Rejected by the army because of his petite size, French dress designer Andre Leriche conceives the idea of designing a gown that will aid his country. His employer, Madame Felice, sells the gown to Mrs. Mortimer Reyton, a middle-aged woman who is gradually losing the love of her husband. The gown so transforms her that, in honor of their wedding anniversary, Reyton buys three ambulances for France. Mrs. Reyton then sends the gown to her cousin Natalie. The garment so inspires Englishman Neil Cunningham that, to win Natalie's love, he returns home to enlist. In France, Neil proves himself a hero and, while leading an attack on a German stronghold, saves Andre's father, the mayor of the town, from death. Thus, the gown made a reality of Andre's dream to serve his country.

Andre was only a dressmaker's designer, too puny to fight for his beloved France in the trenches. He could only design dresses, but one of his creations made two women happy, gave three ambulances to his homeland and sent into the trenches the soldier who led the charge that saved his father's life.—Moving Picture World synopsis