A romantic tale set in feudal China in the 2nd century B.C. which centers around the story of Ying Zheng, a power-hungry heir to the throne of the kingdom of Qin, whose bloodthirsty goal is to conquer the other six kingdoms existing in China and merge them into his own, under his rule. In preparation for the second of his six assaults, Ying gains the help of his concubine, Zhao, who travels the kingdom of Han as a spy, in order to make the king believe that she has fallen out of favor with Ying. Once in Han, and together with the King, Zhao will find an assassin, who will be sent to kill Ying, but Ying will be prepared for the assassin's onslaught, and in defending himself, will be considered unstoppable.