Kang-sook (played by Lee Mi-sook, winner of numerous acting awards in South Korea) and her daughter Eun-jo (played by Moon Geun-young, best known for Autumn Fairy Tale) are running away from the abusive Mr. Chang, whom they live with. Mr. Chang realizes that the two ran away with his diamond ring and sends gangsters to catch them. While running away from the gangsters, Eun-jo runs into Hyo-seon (Seo Woo) in a toilet stall on the train and tells her to keep the ring for her. Kang-sook later visits Hyo-seon's house to get her ring back and finds out that Hyo-seon's father (Kim Gab-soo) is a rich widower. She successfully lures and marries him. Hyo-seon's father dies years later, and leaves his beloved daughter behind with a mean stepmother, an aloof stepsister, and a large inheritance. The melodramatic tale of two sisters forced to become family through marriage captured the attention of South Korea throughout its run, as it told the classic tale of Cinderella through the eyes of the stepsister, Eun-jo.