Impoverished Molly O'Toole takes a job as housekeeper at the country home of wealthy Mrs. J. Van Ranselear Todd. Arriving at "Castle Crags," Molly is mistaken by the villagers for Mrs. Todd, and decides to continue the masquerade, thus attracting the attentions of Captain Hancock, her wealthy neighbor. Meanwhile Mrs. Todd's mischievous and lazy son Algernon has purchased a donkey and cart from peddler Joe Holmes and is traveling through the country when he arrives at Castle Crags to discover Molly masquerading as his mother. Deciding not to reveal his own identity or expose Molly, Algernon takes a job as her chauffeur. The two fall in love and Algernon begs Molly to marry him, but she is reluctant to part with the captain's millions. A series of events makes Molly believe that her chauffeur has become a forger on her account, however, and she realizes her love for him. She resolves to give up the captain, but at that point Mrs. Todd arrives, claims Algernon as her son and welcomes Molly as her future daughter-in-law
Based on novel The Upper Crust (1913)