During the Warring States period, Qin grows ever stronger, repeatedly waging war against the six other states. Acting on Sima Cuo's advice, the King of Qin attacks Ba and Shu first, seeking to secure their granaries and a strategic position from which to strike Chu.
Unable to defeat Qin in a direct confrontation, the King of the Ba people travels among the states, befriending the heroes of his age and rallying the various states to resist Qin. The King of the Ba appears in many famous events of the Warring States period, including the Four Lords of the Warring States, Han Fei, the famed generals Lian Po, Li Mu, Zhao She, and Xiang Yan, Lü Buwei, the King of Yiqu, Li Bing's Dujiangyan irrigation system, the Zhengguo Canal, the Battle of Changping between Qin and Zhao, the theft of military tallies to rescue Zhao, the defense of Handan in Zhao, Li Mu's defeat of the Xiongnu, and Jing Ke's assassination attempt on Qin, among others.
Qin's strength grows, and it unifies the states. To escape the ravages of war and avoid annihilation, the Ba people disperse and go into hiding.