港(gǎng )生(王祖贤(🔨) 饰)从大(dà )陆(📼)偷渡至香港,一路(🕋)颠簸还(hái )被蛇头(tóu )(🕰)欺辱,搏斗过程中将蛇(🐉)头(tóu )打伤才逃脱出来(lái ),但外面(📿)的世界(jiè )(⏬)同样令她感(gǎn )(🏇)到陌(mò )生惶恐。她起初预备(🎩)投靠自(zì )己(🎡)的姨妈,却遭到姨妈拒绝且冷(lěng )(🐖)言讽刺港生(🎫),而姨父则垂涎(😻)其美(měi )(🖍)色(sè ),港生(🕕)只得离开(kāi )(🤷)姨(🔊)妈家再(🚢)次流落街头。督(dū )查何定邦(bāng )((😞)周润发 饰)和祥(xiáng )仁(吕方 饰)追捕白(🐑)粉雄,白粉(fěn )雄驾车(👓)冲出街(jiē )道撞(zhuàng )倒了路边的港(gǎng )(🤷)生。港(gǎng )生在医院(yuàn )(⛳)苏醒以后(hòu )害怕身(🎋)份败露被送(sòng )回(huí )大(dà )(🤖)陆,灵机一(yī )动谎称自己脑(💔)部受(🥊)伤得(dé )了失忆症,还(😊)“认(➡)准”何(hé )定(⛏)邦就(jiù )(👪)是其丈夫伟雄(xióng )。心性(📟)善(shàn )良的定邦只(🙎)得(💿)将港生接(🤔)回(huí )家中暂住,二人关系(📸)日渐改变,但港(🐞)生(shēng )“偷(tōu )渡客(🚲)”的身(shēn )份却像两人关系中(zhōng )的定时炸弹时时刻刻(🍁)存在着……