Set in 1930s China, DRUNKEN MONKEY is a kung fu classic starring Lau Kar Leung as Wen Biao. He plays a security company owner whose brother Wen Bao and villain Yu Haiyang betray him in order to usurp his business for covert opium trafficking. They leave Wen Biao, a Monkey Fist expert, for dead but is tracked down by a couple of martial arts enthusiasts putting together a definitive manual of kung fu. Master Wen is skilled in the art of 'Drunken Monkey Fist' whereby a fighter consumes alcohol to improve skills and resist pain.