As the world counts down to the year 2000, an evil conspiracy awaits to be uncovered. Can the cyber detective nail the hacker in time ? Will human emerge the bigger millennium 'bug' ? All is unveiled in this action thriller which highlights the repercussions of the Y2K phenomenon. Beautiful Jie is an outstanding cyber detective whose brief marriage to Yu ended over character differences. During an investigation, Jie runs into old pal Xuan and romance blossoms between them. Xuan is a computer prodigy whose father owns an enterprise which creates computer viruses for business gains. Yu is haunted by childhood memories of a computer hacking episode and accidentally discovers his hidden talent in computing. Meanwhile, Jie suspects that Xuan's father may be the mastermind behind the Y2K conspiracy.

二十年前，一位名叫奥法的8岁儿童神奇地闯入美国联邦政府电脑系统，引起联邦政府惊恐，联邦调查局如临大敌，全体出动，终将此案破获，奥法因此被尘封记忆，并判21岁前不得接触电脑。

　　二十年后，又有一名十几岁的少年受电脑黑客传授侵入航空公司电脑网络，扰乱导航系统，使班机在飞行时，无故撞向高压电柱。电脑黑客又在动画软件中插入经伪装的暴力画面，在催眠的作用下，利用潜意识控制人的思维，毒害青少年，以致发生校园中学生杀人和自轰事件。黑客高手“千禧资讯科技”公司，不断研制一代又一代的电脑病毒，侵入网络，造成危害后，又堂而皇之地派人上门“解毒”，牟取暴利；更有甚者，他们侵入中森银行电脑系统，致使储户帐目丢失或款额改变，市民人心惶惶，争相提款，造成暴力事件；新千年来临之际，他们妄图利用“千年虫”，破坏全球电脑，引起恐慌，从而达到统治全球网络的野心。

　　警方奉命与其展开了正义与邪恶的较量，经过一场又一场惊心动魄的恶战，终将恶魔降服，全球顺利迎来新世纪曙光。正当人们欢欣鼓舞跨入新的世纪，黑客高手又丧心病狂地卷土重来，警方再度出击……