In Paris Mildred White becomes romantically involved with both Derwent Ainsworth and Dr. Mario Martinez. She prefers Derwent, but when he leaves suddenly to see his dying father, Mario convinces Mildred that he has deserted her. World War I begins, Derwent returns for Mildred, but upon learning that she is leaving Paris with Mario, he enlists in the army. Mildred, learning of Mario's deception joins the Red Cross to be near Derwent. When he is blinded in battle unbeknownst to him Mildred assumes his care. Their love renewed, though he is unaware of her identity, the two soon marry. Mildred then prevails upon Mario to perform a special operation on Derwent's eyes. His vision restored the pair restate their love.
David Aldrich aspires to be an author. The publishers reject most of his manuscripts because they seem to lack realism. David struggles on, however, determined to succeed and kept happy by his love for Helen Chambers and for his bosom friend Morton, who is a young minister working among the people on the East Side.
Our Mutual Girl was unique. Not quite a serial, not quite a newsreel and not strictly an advertisement, it combined elements of all three. In 52 weekly one-reel episodes, running from January 19, 1914 to January 11, 1915, the Mutual Girl outwitted villains, saw the sights of New York, met with theatrical and political celebrities (who frequently helped her out of trouble) and tried on fashionable outfits in chic stores. The fashions were an early example of product placement, although apparently not paid placement.