『同齡人(ren)(ren)』介紹:上(shang)海(hai)(hai)灘十(shi)里洋場,是無(wu)數人(ren)(ren)追(zhui)夢(meng)的(de)(de)樂園……天生神力的(de)(de)青年馬(ma)永貞(zhen)(伍允(yun)龍(long)(long) 飾)從家鄉來到上(shang)海(hai)(hai)謀生,在(zai)當時占有上(shang)海(hai)(hai)一(yi)半(ban)勢(shi)力范圍(wei)的(de)(de)老(lao)幫(bang)(bang)(bang)派斧頭(tou)幫(bang)(bang)(bang)治(zhi)下謀得一(yi)份苦工,豈(qi)料因同伴(ban)竊取斧頭(tou)幫(bang)(bang)(bang)的(de)(de)鴉片,在(zai)后者發難之(zhi)際與同住貧(pin)民(min)區的(de)(de)老(lao)鐵(洪金寶 飾)將(jiang)工友救下,為了追(zhui)蹤那批(pi)鴉片的(de)(de)下落(luo),馬(ma)永貞(zhen)與上(shang)海(hai)(hai)另一(yi)半(ban)勢(shi)力范圍(wei)的(de)(de)主人(ren)(ren)——新近崛(jue)起的(de)(de)龍(long)(long)七(qi)(qi)(安(an)志(zhi)杰 飾)不打不相識(shi),并因為受到斧頭(tou)幫(bang)(bang)(bang)排擠,不得不與同伴(ban)們投奔龍(long)(long)七(qi)(qi)。因秉持母親的(de)(de)教(jiao)誨,馬(ma)永貞(zhen)無(wu)意(yi)加入(ru)龍(long)(long)七(qi)(qi)的(de)(de)幫(bang)(bang)(bang)會,但龍(long)(long)七(qi)(qi)不以為意(yi),反與之(zhi)結為知交。不久,那批(pi)鴉片的(de)(de)真正主人(ren)(ren)——日本(ben)人(ren)(ren)為了介入(ru)上(shang)海(hai)(hai),利(li)用斧頭(tou)幫(bang)(bang)(bang)和龍(long)(long)七(qi)(qi)的(de)(de)矛盾欲置龍(long)(long)七(qi)(qi)與老(lao)鐵等人(ren)(ren)于(yu)死(si)地,馬(ma)永貞(zhen)忍無(wu)可(ke)忍,誓(shi)要(yao)復仇……