警探(tàn )(🕕)李(🍅)SIR即将退休,却遇上内地悍(hàn )匪(fěi )来港械劫珠宝,女(🕰)匪(fěi )(🤢)徒宋玲将(jiāng )珠宝藏于电梯内,玲之男友阿(🥩)伟(💤)把李SIR的佩(🎲)枪(qiāng )夺去(🌗)。警方(fāng )增(zēng )援赶到,宋(🕔)玲被(👑)捕,伟(wěi )被迫逃(🕖)走,藏身于(yú )出(🔲)租车司机大(🚥)麻成家,大麻成(chéng )欠下高利(✖)贷,儿子阿磊(🐶)患有自闭(😱)症,女儿阿(⏺)蓉(róng )乱(🌙)搞男女关系(xì ),伟为免节外生枝,期间把上门讨债者和要求(qiú )与蓉分(fèn )手(shǒu )的男友(🤠)一一打(dǎ )发走,令大麻成一(⏰)家(jiā )对(duì )伟产生好(👃)感。李SIR不想(xiǎng )临近退休因为失(shī )(🕐)枪而受(🚴)影响,希望靠自己(jǐ )夺回失枪。李SIR押解宋玲,伟(wěi )计划(huá )营(yíng )救(🐛),岂料悍匪头目阿光与同党(dǎng )半途劫走(zǒu )宋玲(🏒)和(🙎)李SIR逼(🤔)玲(📧)说出(😙)珠宝下落(luò )(🔤)。光生性(xìng )凶残(cán ),要(yào )将李和(🍽)玲灭口以独吞珠宝。伟只有一(🖍)把(🔫)从(cóng )里SIR手上(shàng )(🏓)夺得的警枪,却(😳)要(👗)挑战(zhàn )阿(ā )(🚻)光及其同(tóng )党强大的(de )火(💅)力。