As a baby, Patsy Smith is kidnapped by her father following a bitter quarrel with her mother. After her father dies at sea, a seafarer named Captain Barnaby places Patsy at Mrs. Duff's boardinghouse. She grows up working as a domestic drudge, deeply unhappy with her life. Inspired by Captain Barnaby's storytelling about Aladdin, Patsy sets out to find an old Oriental lamp that once belonged to her father. She learns that Mrs. Duff sold it to a junk peddler and goes to buy it back. Patsy rubs the lamp, unleashing a Genie. The Genie helps Patsy by providing her with fine clothing, exposing her abusive boardinghouse mistress, and eventually reuniting Patsy with her long-lost mother. With her life transformed, Patsy also finds romance with Harry, a young man who resides at the boardinghouse.