Unable to see eye to eye with his father, completely broke and with nowhere else to turn, young Wong Fei-Hung (Jackie Chan) grudgingly accepts the tutelage of Su Hua Chi (Siu Tien Yuen), a notoriously intoxicated martial arts master. Su Hua Chi teaches Wong the techniques of Drunken Boxing, an unusually fluid fighting style. Wong is then forced to put his new skills to the test when his father is targeted by deadly assassin Thunderleg (Jang Lee Hwang), who has never lost a fight.