吴亚(🕕)秋(吴耀汉 饰)(🐽)和(🥇)贝多(duō )芬(岑(🍩)建勋 饰(🕋))是香港警署反黑组一(yī )(🎺)对(🔧)活宝警(🆖)员,这(zhè )对师兄(🔬)弟吊儿郎当(dāng )(💤),不务(📿)正业,入行十多(duō )年还是初(😎)级(jí )警员(yuán )。好在他(tā )们生(shēng )性乐观,加(🕯)上(shàng )(👁)陈sir(陈欣建 饰)(🕌)对(duì )二人多(duō )有(yǒu )照顾,因此他(tā )们倒也十分享受这样(🐖)的逍遥生活。所谓傻人有傻(🌚)福,亚秋阴差(chà )阳(yáng )错还得(dé )到(dào )陈sir的(de )女秘书(shū )安娜﹝(✋)叶德娴(xián ) 饰﹞(🌞)的垂青。他们受命调查从(cóng )事不法勾(gōu )(🧤)当而暴(bào )富的(de )(⛳)商人夏正毅(陈龙 饰(shì )),只是(🤖)对方分外狡(jiǎo )猾,不露出(chū )任何马脚。夏的(de )情(qíng )妇掌握(wò )他(tā )(🈸)各种犯(🐛)罪勾当的账(🥋)本,并(bìng )以此作要挟。夏(💯)命手下杀害(hài )情妇,而亚秋(🔍)和贝多芬则成(chéng )(👌)为了(📸)尸体(tǐ )的最先发现者。夏正(zhèng )(🏴)毅(🚲)为了(🔎)得到(🔙)账(🌱)本,于是向情妇的(🚡)表(🌸)妹伸出(🏓)毒手,亚秋和贝多(duō )芬能(néng )(📤)否将罪犯绳之于(⏺)法?