港生(王祖贤 饰)从大(🥇)陆偷(📒)渡至香港,一路颠簸(bò )还被蛇(🔱)头欺辱(rǔ ),搏斗过程中将蛇头打(dǎ )伤才逃(🏴)脱出(🐮)来,但外面(miàn )的世界同(tóng )样令(❣)她(tā )(🌗)感(🏇)到(dào )陌(📼)生惶恐。她起初预(👑)备投(tóu )靠自己的姨(yí )妈,却遭到(dào )姨妈拒绝且冷言讽(fěng )刺港生,而(🗑)姨父(🍮)则(✖)垂涎其(qí )美(měi )色,港生只得离开姨妈家再次流落街头(tóu )。督查何定(🛑)邦(周润发 饰)和祥仁(吕方 饰(🙂))追(🔝)捕(bǔ )白(bái )(🐑)粉(fěn )(🏂)雄,白粉雄驾车(👓)冲(chōng )出街道(dào )撞倒了路(🍄)边的(de )港(gǎng )生(shēng )(👃)。港生在(🤲)医院苏醒(xǐng )以后害怕(pà )身份败(bài )露被送(sòng )回(🧣)大(dà )陆,灵机一动(dòng )谎称自己脑部(bù )受伤得了失忆症,还“认准”何(🌹)定邦就(jiù )是其(🤷)丈(🃏)夫伟雄(🌼)。心(💹)性善良的定(dìng )邦(bāng )只得(dé )将港生(shēng )接(jiē )回(📧)家(🔍)中(😙)暂住,二(🔤)人关系日渐改变,但港生“偷(🔞)渡(🏴)客”的身(shēn )份却像(xiàng )两人关系(🔫)中(💣)的定时炸(📞)弹(⏳)时(🏓)时(shí )刻(kè )刻存在着……