Jackie Chan stars in this uncharacteristically somber early work helmed by the legendary martial arts director Lo Wei. When kung-fu master San-thye is killed by the nefarious Chung Chien-kuen (Yam Sai-kwoon) of the Patience family, his student Tang How-yuen (Chan) takes San-thyes widow and his daughter (Nora Miao Ker-hsiu) with him on his quest for vengeance. Once Tang tracks down Chung, he reluctantly agrees to give his masters killer three days time to prepare. When he returns, Tang learns that Chung sawed off his own leg rather than fight the strapping lad. Though deeply disappointed, Tang has other things to worry about. The villainous Wei clan has poisoned San-thyes widow and holds the only known antidote. Eventually, the family convinces Tang to help them fight the Patience clan. Yet when their activities grow ever more devious and dishonest, Tang finds himself caught between the two warring clans. ~ Jonathan Crow, All Movie Guide