In Paris, wealthy young American Horace Martinache takes a young flower girl to a hospital after knocking her down in his auto, and leaves money with friends to pay for her education. Years later, when Horace's nephew Eric plans to bring home a young actress whom he met in Europe and wants to marry, Horace's mother and sister ask for his help in breaking up the romance. Horace, an unmarried colonel, indulges them and agrees to court her to make her lose interest in Eric. The actress, Sara St. Ypriex, recognizes Horace as her benefactor and encourages him. Horace, unaware that Sara was the flower girl, falls in love with her. After Eric fails to respond to Sara's cries of alarm when one of her other suitors, Roscoe Vandercourt, tries to attack her, Horace protects her, but Vandercourt escapes. Sara accepts Horace's marriage proposal and Vandercourt, really an international crook, is trounced by Sara's father, who earlier served a prison term because of Vandercourt's treachery.