Leaving behind an inch of sword in the spent corpses of his opponents, Tuan Changqing is known as the Deadly Breaking Sword. After barely surviving a duel, one of his foes is treated by the diabolical Dr. Kuo, who uses his powers of mind control to transform the man into a somnambulistic killer. After Tuan Changqing teams up with Rabelaisian gambler Xiao Dao, the story proceeds as a comical kung fu buddy flick.
狄龍
as Tuan Changqing / Deadly Breaking Sword
Alexander Fu Sheng
as Xiao Dao, the Little Dagger
Shih Szu
as Liu Yinxu
Ku Feng
as Dr Guo Tiansheng / Killer Doctor
陳惠敏
as Lian San / Throat Piercing Halberd
Lily Li
as Luo Jinhua
Shum Lo
as Boss Luo
詹森
as Officer Fan Fei
Ai Fei
as Chen Yinggang
夏萍
as Madam Li Xing
惠英紅
as Xiaoqin
Keung Hon
as Dr Guo's Hanger-on
