绰号“Laughing哥(📼)”的(🏽)警员梁笑(xiào )棠(🃏)((🕋)谢(xiè )天(🕟)华 饰)成功完成卧底任务,并在(zài )CIB得到重(🐮)任。但(😧)总管Harry(刘松仁(rén ) 饰)和上司Jodie(陈法拉(lā ) 饰),对他的(de )(🥄)操纵者之(🚥)死有(yǒu )怀(huái )疑,在(zài )调(diào )查中发(🍮)现(xiàn )其(qí )中(zhōng )另有隐情(🐶)。在CIB招(zhāo )(🤷)新后,Laughing和Jodie因(yīn )训(xùn )(❔)练理(lǐ )念(🌑)不同,成 为一对欢喜冤家,互有胜负,各(gè )不相让。Harry在照(🥫)顾患(huàn )癌(🧤)症的妻子之外(wài ),又要面(miàn )(🏯)对因他坐牢(🐀)二(èr )(🧟)十年(🧣)刚(gāng )出狱(yù )(🕯)的前女友(🤘)袁(🈁)君(jun1 )岚(lán ),好(hǎo )在儿子Aidon舞技出众,又乐于助人,让他心安。为(🚶)了对抗义(💯)兴,Laughing培植跛CoMichael(黄宗泽 饰(🏃))为线人,后(hòu )者逐渐在帮(bāng )派头(🔫)马辣姜与威利争斗中(zhōng )获(🍁)得(dé )重(chóng )用,并脱(tuō )离了Laughing的掌控(❓),与(yǔ )(✖)昔日律师女友姚可(⛴)可(徐子珊 饰)爱火重燃(rán )(🍯),并努力(lì )上位。随着(💛)帮派坐(🐅)馆莫一(✒)烈的(de )回归,一场警匪(🚓)卧(📯)底之(♊)争、黑白人(rén )性缠斗愈演愈烈……