There was once a dark age when Hong Kong was under British colonial rule. During that time, the police were highly corrupted. In the span of 10 years between 1963-1973, the amount of money involved in corruption amounted to 100 million.

    The person who was the leader of the corruption practices was senior inspector Lak (Tony Leung). Whenever he was unable to solve a case, he would ask his subordinate Unicorn (Anthony Wong) to look for a scapegoat. This time, Fiery Unicorn caught university student Bong (Alex Fong) to admit to a spate of robbery, assault and molestation cases. Fortunately, Bong’s mother  manage to enlist the help of Gold (Wong Jing) and Fiery Unicorn was forced to release the innocent man.

    Gale (Eason Chan) was also Lak's subordinate and was promoted to inspector. One day, he met drug pusher Rose (Liu Yang) who was pursued by drug dealer Chao Zhou Zhu. He was injured while saving Rose. Lak was furious and he ordered Chao Zhou Zhu to give his territories to Rose. During the process, Gale and Rose became friends and he secretly backed Rose's illegal activities.

    Meanwhile, Lak became interested in Fiery Unicorn's girlfriend and they met secretly. After Fiery Unicorn found out the truth, he was demoted.

    During the early 1970s, Lak became increasingly arrogant and he did not even respect the new police chief. The Hong Kong governor set up ICAC to deal with corruption and Yim (Bowie Lam) was in charge of arresting Lak. Bong and Fiery Unicorn who wanted to take revenge against Lak, joined forces with Yim. Through sheer perseverance, they successfully bring down the corrupted police force. Lak knew that his time has come and he prepared to escape to Taiwan. The ICAC also prepared to arrest Gale. What would be his ending like?

《金钱帝国》乃是一部予反映香港廉簇政郊公署成立前，黑社会及警察之间的一些幕后交易的年代沦陷。此片由王晶自导自演，并与梁家辉、陈奕迅、黄秋生、林保怡、方力申及孟瑶等人联合主演。

    首次深度揭露香港历史上最大巨贪帝国黑幕！1963－1973年，在英国管治香港期间，曾经有一段黑暗时期。当时，警队贪污受贿是公开的秘密。单单在1963至1973十年间，香港警员贪污的金额达到当时的100亿，约相等于2009年的5000亿！

    作为整个贪污帝国的“皇帝”——香港总华探长Lak哥 (梁家辉饰)，手下圈养多条“毒蛇猛兽”。不仅有像猪油糕(王晶饰) 这样专门负责联通黑白两道的古惑老大，也有滥赌成性的辣手探长火麒麟 (黄秋生饰) ，关键时候能为各种错案找代罪羔羊。而探长陈细九 (陈奕迅饰)则是Lak哥下属唯一一个天良未丧的好心人，因球技了得获Lak哥赏识。
 
    庞大的组织，无孔不入的手段，Lak哥和其一班兄弟过着常人难以想象的花天酒地，挥金如土的生活，并用自己的一整套“处世哲学”以及巨大金钱的力量把香港99%的警察拖下水。
 
    就在Lak哥以为自己能只手遮天永世逍遥的时候，香港成立了廉政公署，由干练的严国梁 (林保怡饰)带领一干青年才俊，下定决心杜绝一切贪污舞弊，恢复香港政府和警界的严肃清白。
于是，一场惊心动魄、旷达持久的反贪战争就此拉开序幕，这是正义和邪恶之间的殊死搏斗开始。