民国初年(nián )，徐(✒)警(🐽)长（张(zhāng )(📒)国(guó )强(qiáng )(🐌) 饰(🔼)）因(🃏)一桩(zhuāng )(😘)案(🕟)件与(yǔ )(🛍)洋(yáng )行(🕰)的(de )(🤢)景(jǐng )(🤴)氏（蒋(🔧)志(🎗)光(🎹) 饰(shì )(🥈)）结下(xià )(🌰)不(🍖)解之(zhī )缘，并(🥩)各(💤)获(😧)赠(zèng )一(yī )幅(fú )油(yóu )(👋)画(⏬)用(yòng )作纪(jì )念(niàn )当(🏇)日(♑)破(pò )案(àn )(😎)有(yǒu )功(gōng )。多(🐿)年(🕔)后徐(👑)警长(🤷)的(🗄)后(🛍)人(rén )依(🕖)旧(jiù )(🕯)以(yǐ )(👁)投身警(✳)界(🔲)为(🥄)荣，人(🏐)称(chēng )犀(🐖)利(lì )妹(🛺)的(de )(📞)徐(xú )(🎿)小丽(lì )（杨怡(yí ) 饰(shì )）(😻)便(biàn )(🚸)是警队的(de )(🥀)一(yī )名(míng )(🤯)干(gàn )将(🐖)。加(jiā )入(rù )(💞)重(chóng )(⏺)案(àn )(🚢)组(🌙)之(📎)后(🧚)的(🚣)徐(xú )(🔩)小(xiǎo )丽跟(📯)随(suí )上(shàng )司(sī )(⏯)卢(lú )(😞)天(🖲)恒（(❔)马(mǎ )(💱)国明(🌑) 饰）侦破(pò )一(💻)件(jiàn )(🗞)又(yòu )一(yī )件(jiàn ) 棘(jí )(🐑)手的案(àn )(🤠)件(jiàn )(🤸)，从(🙄)旁一(👓)直(zhí )(🙀)用(yòng )专(zhuān )(💪)业(yè )(⛓)物(wù )理(⏰)学(🈴)知(zhī )识(⛏)辅(fǔ )(🥫)佐(zuǒ )(🤷)他(tā )们(men )(🧤)的(de )是(shì )(🚻)卢(lú )(🤲)天恒的校友(yǒu )，同(tóng )(🏯)时(shí )也是(shì )大(dà )(🕐)学(🐀)的副(fù )(🚴)教(jiāo )(🧣)授(🤖)、景(jǐng )氏(shì )(🌮)后人(rén )景(jǐng )(🤘)博(bó )(🈁)（(❕)林(💝)峰 饰）。 　　(🚗)出(chū )生(shēng )(🦇)寒(😊)微(wēi )(🈸)的徐(xú )小(xiǎo )丽(lì )(🌹)对(⛏)景(🐨)博(👪)的佩服(fú )(🃏)逐(zhú )渐(jiàn )变成(chéng )爱(ài )(💹)慕(mù )(📟)，景(jǐng )(💯)博(bó )也(yě )(🔈)对(duì )关(🙎)心照(zhào )(🎥)顾(gù )自(🈺)己的徐小(xiǎo )丽日(⏲)渐倾(qīng )心。但因(🥤)两(🔷)家(jiā )家(jiā )世(💸)悬殊(shū )(🐞)，父母(mǔ )(🔞)的(de )阻(🚲)拦(lán )(📐)让(ràng )景(🌂)博(bó )决定(👄)放(fàng )弃(🆙)这(zhè )(🖍)一(yī )(🔫)段(💣)感情(🚡)。另(lìng )(📞)一(yī )(⏳)边(biān )(🏓)，花(huā )花(🍁)公子(zǐ )(👛)卢(lú )天(tiān )(😳)恒(héng )与(yǔ )密(mì )(📤)友(🚻)敏(mǐn )嘉（(🐂)廖(liào )碧(🛃)儿(ér )(⏺) 饰）一直维(📬)持(chí )着(zhe )(🕺)亦是(🎴)朋友(yǒu )亦(yì )(🚩)是(shì )(🍹)恋人(🏸)的暧(💁)昧关(guān )系。却(què )(👅)不(🈳)料(liào )(🐈)敏(mǐn )嘉(🍯)突(tū )(🔍)然(🌲)有(💕)了爱(ài )人(rén )(🐌)，并(bìng )想(xiǎng )(💛)与(👼)之结(jié )(🐅)婚(hūn )。令人(rén )焦(jiāo )(🈸)灼的(🛃)案件(🍾)层(🕵)出不(bú )(🚓)穷，这(zhè )两对年(nián )轻(qīng )人(🗒)的(🏆)爱(ài )情(qíng )又(yòu )(🎁)将(jiāng )(🎆)如何继(jì )续…(🍈)…(🕌)