After losing everything for a crime he didn`t commit, Ken vows to travel back to the Qin Dynasty and reclaim everything he lost by usurping the throne. Still living in the Qin Dynasty, Hong Siu-long now lives as a recluse with his family in the countryside. However, his disciple, the Qin Emperor, still watches his every move. When the unified Qin Dynasty`s short-lived peace is shattered by Ken`s sudden attack, the Qin Emperor is forced to turn to the mentor that he respects and fears for the first time in 20 years. Their fight against the time-traveling villain will change the fate of the Qin Dynasty and the course of history.