Ambitious Prince Four (Liu Yung) attempts to kill the potential heir Prince Fourteen (Mok Siu-chung), but the latter is rescued by his aide Tseng Tsing (Hsu Shao-chiang). After an unsuccessful attempt to buy Tseng Tsing, Prince Four tries to murder him, but fails. He eventually hires Nien Keng-yao (Pai Piao), an outstanding martial artist, as his aide.