『怎么讓雞(ji)變粗二次(ci)發育(yu)』介(jie)紹:重(zhong)案組沙展馬(ma)軍(甄子(zi)丹 飾(shi)(shi))致力抓拿犯罪分子(zi),身(shen)手(shou)(shou)不(bu)(bu)凡的(de)他由于抓賊(zei)心(xin)切(qie)常常出手(shou)(shou)過重(zhong)。警(jing)方一(yi)直(zhi)搜集越南(nan)幫(bang)兄(xiong)弟阿(a)渣(呂(lv)良偉 飾(shi)(shi))、Tony(鄒(zou)兆龍 飾(shi)(shi))、阿(a)虎(行(xing)宇 飾(shi)(shi))的(de)犯罪證據,于是派出了華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)(古天樂(le) 飾(shi)(shi))以臥(wo)底的(de)身(shen)份潛入(ru)他們(men)之間。三兄(xiong)弟為人(ren)心(xin)狠手(shou)(shou)辣(la),想鏟(chan)除掉眼中釘(ding)阿(a)山。阿(a)渣被(bei)(bei)抓后,Tony也識破了華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)的(de)真實身(shen)份,要將(jiang)華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)以及(ji)其他證人(ren)通通殺掉,救出大哥(ge)。華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)女(nv)友秋堤(范冰冰 飾(shi)(shi))被(bei)(bei)挾持(chi),華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)不(bu)(bu)得不(bu)(bu)放棄指證阿(a)渣。華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)與女(nv)友都抓走當人(ren)質,馬(ma)軍也帶著(zhu)阿(a)渣去營救華(hua)(hua)(hua)生(sheng)(sheng)(sheng)(sheng)。