『第(di)二(er)書包辣網』介紹:沖(chong)(吳彥祖 飾(shi)(shi))和(he)(he)瞳(tong)(tong)(古天樂 飾(shi)(shi))是同卵雙胞胎,自小沖(chong)就(jiu)生活在(zai)哥哥瞳(tong)(tong)的(de)光芒之下(xia)。豈料在(zai)沖(chong)26歲生日那天,收(shou)到了(le)瞳(tong)(tong)的(de)死訊。沖(chong)在(zai)瞳(tong)(tong)的(de)遺物中找到了(le)一條鑰匙,由此走(zou)進了(le)瞳(tong)(tong)的(de)世界。瞳(tong)(tong)結識女友阿(a)陸(谷祖琳 飾(shi)(shi))時,曾教(jiao)訓了(le)阿(a)陸的(de)前古惑仔男友阿(a)文(wen)(譚(tan)耀文(wen) 飾(shi)(shi))。阿(a)文(wen)領教(jiao)完瞳(tong)(tong)的(de)重拳(quan)后(hou),發現(xian)瞳(tong)(tong)天生就(jiu)是拳(quan)擊界的(de)冠軍,于是擔(dan)任起瞳(tong)(tong)的(de)經紀人(ren),帶著(zhu)瞳(tong)(tong)去參加(jia)黑(hei)市拳(quan)比(bi)賽。瞳(tong)(tong)所向披靡,由此他和(he)(he)阿(a)文(wen)成了(le)莫逆(ni)。阿(a)陸、瞳(tong)(tong)、阿(a)文(wen)三人(ren)過著(zhu)風光的(de)生活。豈料瞳(tong)(tong)因破壞(huai)黑(hei)市拳(quan)集團(tuan)的(de)游戲規則,被集團(tuan)請(qing)來的(de)黑(hei)人(ren)拳(quan)手活活打(da)死。阿(a)文(wen)在(zai)沖(chong)身上又看到了(le)瞳(tong)(tong)的(de)影子,他的(de)引領下(xia),沖(chong)日夜訓練(lian),渴望打(da)敗那名黑(hei)人(ren)拳(quan)手,為瞳(tong)(tong)報仇……