缉毒民(🍅)警李涤凡(邢佳(jiā )栋 饰(shì ))在(zài )侦察(chá )一条(🃏)贩(🕋)毒线索时惊(🔱)异地发现(xiàn )(🍥),与他相恋多(🥈)年的女友林(🔬)明慧(🗼)(岳跃 饰)竟然(rán )牵(⏬)连其中,令(🏇)他百思不得(dé )(🖲)其解。这时上级(🤷)不(🗄)分(fèn )原由地(dì )将(jiāng )他(🙍)调(diào )离一线(🥄)缉毒(dú )大队,降为普(pǔ )通(🎿)社(🎫)区民警,而(ér )刚(gāng )刚被抓的明(🐶)慧则无(wú )(🤯)罪释放,然后不知所踪。面临(🥁)生活、爱情(qíng )及事(🖲)业的双重受(🌑)挫,李涤凡陷入 不解和(hé )迷惘,但很(🤸)快,职业警(jǐng )(🙀)察(🙉)的(💪)良好(hǎo )素(sù )质让(ràng )他很快(kuài )进入了角色,他在(zài )干好本质工(gōng )作的(🥕)同时还照(zhào )顾着女(⚾)友(yǒu )生病(👣)的母亲。贩毒(dú )大案破(pò )获(🍑)后(hòu )他才知道(🐾),明慧是省厅(tīng )禁毒处安(👪)排在(🤷)毒枭身边的卧(wò )底(dǐ )。后(hòu )来明慧再次充当内线打(dǎ )入毒贩(fàn )网(wǎng )络(luò )贩(🔤)毒(👌)内部,不幸的是她在一(yī )(🍽)次执行任(rèn )务时牺牲,李(👄)涤凡前(qián )赴后(hòu )继顶了上(📞)去......