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.