『朋友(you)的姐姐5』介紹(shao):香(xiang)港警(jing)方(fang)商業罪案調(diao)(diao)查科高級探長Michael(王凱韋 飾)被上(shang)司(si)委派追查香(xiang)港一家(jia)國際(ji)財(cai)務(wu)公(gong)(gong)司(si),該公(gong)(gong)司(si)與多宗國際(ji)犯(fan)罪集團洗(xi)黑(hei)錢案件(jian)有(you)關,事件(jian)更牽涉其舊(jiu)友(you)梁樂琳。梁離開警(jing)隊后,最近(jin)才(cai)加入(ru)該財(cai)務(wu)公(gong)(gong)司(si)任職業務(wu)主任,與坤哥(雷宇揚 飾)兩(liang)人是該財(cai)務(wu)公(gong)(gong)司(si)石井老板(ban)身邊得(de)力手(shou)下。而且該公(gong)(gong)司(si)正進行一個(ge)(ge)大專(zhuan)生借(jie)貸優(you)惠計(ji)劃,該計(ji)劃正是由梁全權負責。起初Michael打(da)算向梁查探,但(dan)恐怕案件(jian)與梁有(you)關,于是Michael深入(ru)調(diao)(diao)查梁和該公(gong)(gong)司(si)的運作(zuo)情況,并(bing)決定借(jie)助這個(ge)(ge)大專(zhuan)生借(jie)貸計(ji)劃展開調(diao)(diao)查工作(zuo)……