民国(guó )(👷)初(chū )年(nián )(🆓)，徐(xú )(✒)警(🐽)长(zhǎng )（(📼)张国强(qiáng ) 饰）因(yīn )(🃏)一桩(zhuāng )(😘)案件与(yǔ )(🛍)洋(yáng )(🔱)行(háng )(🕰)的(de )景氏（蒋(🔧)志(🎗)光 饰(shì )）(🐉)结(🛤)下(🌰)不(🍖)解(jiě )之(🏴)缘，并各(💤)获(huò )(😧)赠(zèng )一幅(fú )(🌫)油(yóu )画(huà )(⏬)用(yòng )作(🎏)纪(❣)念当日(rì )(♑)破(📼)案(àn )(😎)有功。多年(🕔)后(hòu )徐(xú )警(🎩)长(zhǎng )的(de )后(hòu )人(rén )(🎡)依(yī )旧(jiù )以(yǐ )投(tóu )身(shēn )警(jǐng )界(jiè )(🔲)为荣(róng )，人(rén )(🏐)称犀(xī )(🐖)利(🕌)妹(mèi )的徐小(xiǎo )丽（杨(😚)怡(yí ) 饰）便(🚸)是(shì )(🖍)警(jǐng )(🚑)队的一(yī )名干(gàn )(😱)将。加(jiā )入(rù )(💞)重案(àn )组(🌙)之后(hòu )(🧚)的徐(🔩)小(xiǎo )丽(lì )(🌚)跟(gēn )随上(shàng )司(sī )(⏯)卢(lú )天恒（(❔)马(💱)国(🦗)明(míng ) 饰）侦(🥎)破一(💻)件又(yòu )一(yī )(📙)件(jiàn )(🔝) 棘(jí )(🐑)手(🏂)的(🙌)案(àn )(🤠)件(🤸)，从(cóng )旁(páng )一直(zhí )用专(💪)业物(wù )理(lǐ )学知(zhī )(🍄)识(⛏)辅(🥫)佐(🤷)他(👃)们的(de )是(shì )卢(lú )天恒(⛳)的(de )(😍)校(xiào )友(yǒu )，同(tóng )时(shí )也(🎋)是(shì )(🥕)大学(🐀)的(🧟)副(🚴)教(jiāo )(🧣)授、(⚾)景氏(🌮)后(hòu )(👣)人(rén )(🗳)景(jǐng )博(🈁)（林(lín )(💝)峰 饰(shì )）(🥊)。 　(💍)　出(chū )生(🦇)寒(hán )微(🈸)的(de )徐(xú )(🏻)小(xiǎo )丽(lì )(🌹)对(duì )(⛏)景(jǐng )博(bó )(👪)的(🥋)佩服(🃏)逐(zhú )(🌪)渐(jiàn )(💅)变成爱慕(mù )(📟)，景(💯)博(bó )也(🔈)对(🏒)关(🙎)心(xīn )(💿)照(🎥)顾(gù )自己(🤔)的徐(🔍)小(xiǎo )丽(🤥)日(⏲)渐(jiàn )(📛)倾(🔤)心(xīn )(👌)。但(📸)因(🥤)两(liǎng )(🔷)家(👵)家(♌)世(shì )悬(🥅)殊(🐞)，父(fù )(🏃)母的(de )(🏴)阻(🚲)拦让(ràng )(🔎)景(jǐng )博(🔙)决(jué )定(dìng )放(fàng )(🐖)弃(🆙)这(zhè )(🖍)一(yī )(🔫)段(duàn )(💣)感(🔥)情(🚡)。另(lìng )一(yī )边(biān )(🏓)，花花(🍁)公(gōng )(🔲)子(👛)卢(lú )(🕕)天(tiān )(😳)恒(👗)与(🎦)密友(🚻)敏(mǐn )(🍺)嘉（廖碧(bì )儿 饰）一(yī )直(zhí )维持(chí )着(zhe )(🕺)亦(yì )(💑)是(shì )(🎴)朋(péng )友亦(yì )是(shì )(🍹)恋(liàn )(⛴)人(rén )的(❄)暧(ài )(💁)昧(🈺)关(guān )(⏺)系。却不(bú )料(liào )(🐈)敏(mǐn )嘉(jiā )突然(rán )(🌲)有(yǒu )(💕)了(le )(🈂)爱人(🐌)，并(🖱)想(xiǎng )(💛)与(yǔ )(👼)之结(jié )(🐅)婚。令(lìng )(✒)人(rén )焦灼(zhuó )的(🛃)案(àn )(🛌)件层(céng )(🕵)出(chū )(🎞)不(bú )(🚓)穷(qióng )(📯)，这(zhè )两(liǎng )对(🔍)年(🏗)轻人(rén )的(🏆)爱情(🌒)又(🎁)将(jiāng )如(⛎)何(hé )继(jì )续(xù )……(🕌)