『倫理免費』介紹:香(xiang)港著名騙(pian)(pian)子(zi)黃(huang)(huang)(huang)大(da)(da)(da)千(qian)(qian)(許冠(guan)杰飾(shi)(shi))騙(pian)(pian)術高超,幾十(shi)年來(lai)(lai)憑借(jie)狡黠的(de)(de)(de)智慧暴斂錢財。被騙(pian)(pian)者雖為(wei)貪(tan)心或疏忽使(shi)然,卻無不(bu)捶胸頓(dun)足,后悔莫(mo)及。人送綽號(hao)“笨(ben)蛋”的(de)(de)(de)光頭神探(tan)(麥嘉飾(shi)(shi))二十(shi)年來(lai)(lai)與黃(huang)(huang)(huang)大(da)(da)(da)千(qian)(qian)斗智斗勇,大(da)(da)(da)玩貓(mao)鼠(shu)游戲(xi),可惜這(zhe)只笨(ben)貓(mao)總(zong)也(ye)斗不(bu)過狡猾的(de)(de)(de)老鼠(shu)。居(ju)住(zhu)在香(xiang)港的(de)(de)(de)少女吳寶(bao)蒼(容祖兒飾(shi)(shi))的(de)(de)(de)父親被黃(huang)(huang)(huang)大(da)(da)(da)千(qian)(qian)所騙(pian)(pian),幾度欲跳(tiao)樓了解此生(sheng)。寶(bao)蒼從警方(fang)處了解到黃(huang)(huang)(huang)大(da)(da)(da)千(qian)(qian)已經逃到新加坡,于是(shi)起身前去追蹤。在這(zhe)里(li)她(ta)碰巧遇(yu)見了曾被人騙(pian)(pian)財騙(pian)(pian)情于是(shi)轉而(er)騙(pian)(pian)人的(de)(de)(de)富家子(zi)弟法拉利(謝霆鋒飾(shi)(shi))以及呆頭呆腦的(de)(de)(de)私(si)人偵(zhen)探(tan)助理施笙(sheng)紫(蘇有朋飾(shi)(shi))。三個年輕人決定聯手打敗行(xing)蹤詭異的(de)(de)(de)黃(huang)(huang)(huang)大(da)(da)(da)千(qian)(qian)……