『我兄(xiong)弟(di)的(de)女朋友』介(jie)紹:美國(guo)的(de)“殺(sha)手壕(hao)”格斗比(bi)(bi)賽(sai)(sai)即(ji)(ji)將拉開帷幕(mu),兩支芝加(jia)哥(ge)地區的(de)黑幫(bang)(bang)(bang)都(dou)意欲在(zai)比(bi)(bi)賽(sai)(sai)中(zhong)勝出,而其中(zhong)一方的(de)王牌選手——殺(sha)人王李呼聲頗高。青(qing)年阿(a)龍(long)(long)(成龍(long)(long) 飾)一家(jia)在(zai)芝加(jia)哥(ge)經營飯店,龍(long)(long)父遭(zao)黑幫(bang)(bang)(bang)勒索,阿(a)龍(long)(long)出手趕跑惡(e)人反被父親(qin)抱怨,原來龍(long)(long)父一直不滿阿(a)龍(long)(long)跟(gen)自己弟(di)弟(di)學習武術,斥(chi)之不務正(zheng)業(ye),要求他向做(zuo)了醫(yi)生的(de)長子學習。阿(a)龍(long)(long)教訓惡(e)徒的(de)經過被黑幫(bang)(bang)(bang)二(er)代(dai)當家(jia)彭看(kan)見,彭有意令阿(a)龍(long)(long)為他們(men)出戰(zhan)殺(sha)手壕(hao)比(bi)(bi)賽(sai)(sai),彭所在(zai)黑幫(bang)(bang)(bang)隨即(ji)(ji)毆打阿(a)龍(long)(long)好(hao)友,并(bing)綁架(jia)了阿(a)龍(long)(long)沒(mei)過門的(de)嫂子要挾他與(yu)殺(sha)人王戰(zhan)斗。阿(a)龍(long)(long)和(he)(he)叔叔救人失(shi)敗,無(wu)奈只得刻苦訓練,代(dai)表(biao)彭一伙參加(jia)比(bi)(bi)賽(sai)(sai)。阿(a)龍(long)(long)在(zai)比(bi)(bi)賽(sai)(sai)中(zhong)連(lian)戰(zhan)連(lian)捷(jie),在(zai)他和(he)(he)殺(sha)人王的(de)終極決賽(sai)(sai)之時,彭卻出賣(mai)了他……