被譽為香港電影史上第一部賭片，導演程剛搜羅了中國不同賭術派別，將千術精華盡現眼前。乃當年十大賣座電影之一。劇情描述沙氏家族的賭術千術巳達出神入化之境界，其中沙通（宗華）更是青出於藍而勝於藍，故有「賭王」之譽。然而，沙通因其師遭「牌霸」彭天石（陳觀泰）誣告販毒，致遭判刑十多年，因而背負一段由賭而來的深仇。沙通矢志為師父報仇，聲稱將以「老千千老千，騙子騙騙子」的手段對付彭天石……

在香港，提起赌术，没有人能不想起沙家。沙家是赌术世家，每代传人都是大名鼎鼎的赌王。到了沙通（宗华 饰）这一代，他更是将沙家的赌术发扬得淋漓尽致。年纪轻轻的他早已赌遍香港无敌手，赢得了“赌王”的称号。少年得志的沙通却一直有块心病挥之不去，那就是他的师傅此前遭“牌霸”石天（陈观泰 饰）的陷害，遭到了十年牢狱之灾。如不能为师报仇，沙通这个赌王怎么都当得不是滋味。石天会乖乖坐着等着沙通前来报仇吗？

Chan is Peng Tianshi, who becomes the "Card Tyrant" in response to the gambling world dominance of the Sha family. But Peng also has a Sha family member blinded in retaliation for an earlier loss, leaving the Sha family with a debt of vengeance that needs to be repaid! Sha Tong (Zong Hua) sets in motion an elaborate plan to make turn the rich and affluent Peng into a penniless former king of the gambling world! But can the "Card Tyrant" be bested?