『動物世界性行為(wei)貓』介紹:碧生(sheng)(sheng)與(yu)碧琪(qi)為(wei)朝(chao)街(jie)私(si)鐘妹(mei),感情(qing)(qing)甚篤(du),合稱朝(chao)街(jie)雙Big。因生(sheng)(sheng)欠下賭款,琪(qi)請其男友龍(long)(long)代(dai)出頭,與(yu)西(xi)(xi)洋(yang)(yang)仔(zi)結怨,后(hou)琪(qi)被(bei)(bei)西(xi)(xi)洋(yang)(yang)仔(zi)擄走,生(sheng)(sheng)、龍(long)(long)為(wei)尋回(hui)琪(qi),出生(sheng)(sheng)入死(si),漸生(sheng)(sheng)情(qing)(qing)愫,琪(qi)被(bei)(bei)救(jiu)回(hui)后(hou),發(fa)現生(sheng)(sheng)、龍(long)(long)關系,與(yu)生(sheng)(sheng)漸疏(shu)遠。另方(fang)面,生(sheng)(sheng)結識老(lao)差(cha)骨麥Sir,成為(wei)好友,麥Sir更對生(sheng)(sheng)存(cun)有父女間的情(qing)(qing)義(yi)。麥Sir數(shu)度(du)追(zhui)捕龍(long)(long),均被(bei)(bei)上司靚(jing)(jing)Sir阻止,卻原來龍(long)(long)乃臥底,直(zhi)屬(shu)于靚(jing)(jing)Sir,后(hou)靚(jing)(jing)Sir被(bei)(bei)西(xi)(xi)洋(yang)(yang)仔(zi)所殺(sha),龍(long)(long)被(bei)(bei)麥Sir苦(ku)苦(ku)追(zhui)緝,無從證(zheng)實自己(ji)身份(fen)。西(xi)(xi)洋(yang)(yang)仔(zi)因私(si)竇被(bei)(bei)搗,擄走麥Sir兒子(zi)小杰,逼麥Sir替其殺(sha)死(si)龍(long)(long),危急(ji)中(zhong),困于麻(ma)袋中(zhong)的生(sheng)(sheng)脫縛(fu)撲出,一個(ge)血人撲向西(xi)(xi)洋(yang)(yang)仔(zi)……