退(🈯)休警(jǐng )察豹(bào )(👷)叔膝下有儿子阿国(张国(guó )强 饰)和(😘)养子阿定(🔱)(刘德(dé )(🤴)华(🍥) 饰),阿国曾是(🛤)国(guó )际刑(xíng )警,如今(jīn )返港担任督察;而阿定则混迹黑道,虽然(rán )收(shōu )入丰厚并颇得老(🛍)板杨东(🕯)海赏(shǎng )识(shí ),但阿定拒绝贩(fàn )毒(dú )令杨东海很为难(🗑)。阿定与阿国情(qíng )同手足,但并未打探彼此(⏺)工(gōng )作(zuò )。不(🧚)久(🚣),阿(🥁)国受(shòu )命调查(chá )杨东海一(❔)伙,同时(🎛)阿(ā )定中了杨东海苦(📙)肉计(jì ),不得(🙌)不(🤠)与毒(dú )贩(fàn )接(㊙)洽,结果引(yǐn )发血战(zhàn )(🈴)。背负杀人(👃)嫌疑的(🚻)阿(🤲)定(🕙)被阿国(guó )追(👺)索,侥(yáo )幸逃脱后连累后(hòu )者遭警(🕯)队(duì )处罚。另一方(💝)面,阿(ā )(🏉)定(dìng )(🥊)和阿国(guó )在(zài )警队中(🦇)的对头步步紧(jǐn )逼(bī )(⛏)他们(👪),最终身死,而阿定(dìng )的女友雯雯(萧红梅 饰)为阿定几次犯险,阿定不忍弃她(💸)而去独(🍽)自出国(🏴)避祸,形势越来越向失控的地步(bù )发展…(⏳)…