At the end of the Warring States Period, the seven powers of Yan, Zhao, Chu, Han, Wei, Qi and Qin rose up, but Qin was the most powerful and was eager to annex the six kingdoms to unify the world. As a result, the King of Qin (Chen Daoming) became the enemy of the six kingdoms. Different stories of assassinating Qin were staged in various places. Among them, the Zhao assassins Canjian (Tony Leung), Feixue (Maggie Cheung), Ruyue (Zhang Ziyi) and Changkong (Donnie Yen) were famous for their superb swordsmanship, which made the King of Qin unable to sleep well for ten years. One day, he heard that Changkong had been killed by a Qin swordsman named Wuming (Jet Li). The King of Qin was overjoyed and hurriedly summoned him to the palace to meet him, but he was also cautious to prevent fraud. The battle of wits and courage between the King of Qin and Wuming began.