虔官昌(Kwai Chang Caine,David Carradine饰)是一名中美混血的孤儿,在外祖父死后被少林寺收留,于白大师(Master Po,Keye Luke饰)指点下,得习高深武功。出山后,官昌在街头巧遇白大师。大师因劝诫横行官差被某皇亲用手枪暗算。官昌一怒之下击毙皇亲,在临终的白大师的指点下,决定流亡美国,找寻下落不明的胞兄。在美国西部,官昌因路见不平卷入了一系列纷争,同时,淸帝派出的杀手也紧随其后…… 本片因当时罕见的中国元素,在70年代初的美剧中独树一帜,引起强烈反响。Kwai Chang Caine is a Shaolin Monk who is on the run after he killed the Chinese Emperor's nephew after that coward killed his teacher in cold blood with a gun. He flees to America to escape retaliation, and to search for his brother in order to settle down in this new land. However, in his travels in the wild west, he can not help but continually run into trouble from desperados and other ruffians as they oppress the innocent, while bounty hunters pursue the price on his head. Against this, he has his skill of Kung Fu martial arts, which proves to be devastatingly effective in this gun-dominated land.