『九(jiu)九(jiu)無(wu)碼人(ren)(ren)妻一(yi)區二區三區』介紹(shao):劉國忠(zhong)(zhong)(任(ren)達華飾(shi)(shi))是(shi)(shi)一(yi)個(ge)身(shen)(shen)患絕(jue)癥(zheng)的(de)警(jing)察,他的(de)前途暗淡無(wu)光,他接到任(ren)務要保(bao)護一(yi)個(ge)證人(ren)(ren)的(de)女兒(er)。督察馬軍(jun)(甄子丹飾(shi)(shi))是(shi)(shi)身(shen)(shen)手(shou)了得的(de)武(wu)術家,一(yi)心要接替(ti)忠(zhong)(zhong)的(de)位(wei)置。忠(zhong)(zhong)派去黑道(dao)大哥寶(bao)(bao)(bao)爺(ye)(ye)(洪金寶(bao)(bao)(bao)飾(shi)(shi))身(shen)(shen)邊(bian)的(de)臥底(di)意外死亡,原因不明,忠(zhong)(zhong)懷(huai)疑(yi)是(shi)(shi)寶(bao)(bao)(bao)爺(ye)(ye)所(suo)為。于(yu)是(shi)(shi)把寶(bao)(bao)(bao)爺(ye)(ye)押送(song)到警(jing)局盤問,苦(ku)于(yu)沒有(you)(you)證據,忠(zhong)(zhong)迫不得已開始捏(nie)造證據控(kong)告寶(bao)(bao)(bao)爺(ye)(ye),全警(jing)局都深諳此道(dao),只有(you)(you)軍(jun)蒙在鼓里。然(ran)而,證據神秘消失,寶(bao)(bao)(bao)爺(ye)(ye)走(zou)出警(jing)局時,揚言要殺掉忠(zhong)(zhong)的(de)所(suo)有(you)(you)手(shou)下(xia)(xia),果(guo)然(ran)他身(shen)(shen)邊(bian)的(de)冷血殺手(shou)Jack(吳京(jing)飾(shi)(shi))干掉了忠(zhong)(zhong)一(yi)幫下(xia)(xia)屬(shu),馬軍(jun)意外發現,忠(zhong)(zhong)的(de)下(xia)(xia)屬(shu)和寶(bao)(bao)(bao)爺(ye)(ye)之間原來還(huan)另有(you)(you)恩怨(yuan),馬軍(jun)怒(nu)火中燒,決定與寶(bao)(bao)(bao)爺(ye)(ye)和Jack決一(yi)死戰。