When heiress Betty Hallowell organizes a Red Cross bazaar to raise money for the American effort in The Great War, she is disappointed that the event is not a success, so she decides to lease her beautiful country house to Mrs. Wentworth, a wealthy widow whose son Tom is recuperating from injuries received overseas. When Mrs. Wentworth suddenly demands the services of a maid for the summer, Betty, unable to secure a servant on such short notice, dons a dark wig and poses as "French maid Bettina." Much to his mother's embarrassment, Tom and "Bettina" fall madly in love, but necessity forces Betty to temporarily drop her disguise and reappear as the mistress of the house. Confused, Tom falls just as madly in love with Betty. Finally, he decides that he prefers Bettina to Betty, but Betty's uncle arrives and her deception is revealed. Tom explains his infidelity by stating that Betty's sweetness caused him to love her in both of her identities, and she is satisfied.