Fang Chao Hsiung and Kuei Shien Lien both have the knowledge of Dragon Boxing, which saved a girl named Hsiao Ping, the daughter of Sze-Ma Chin and Hung Shui Ping, from the robbers when passing through San Tao. As they were passing through San Tao, a dying old woman asked them to take care of Hsiao and to find her parents.