In the wake of the successful Sanyou campaign, the Qin army, featuring 1,000-Man Commander Xin, moves steadily closer to realizing King Ying Zheng's ambition of unifying China. Having secured a significant geographical foothold in the state of Wei, Qin now turns its attention eastward toward the remaining warring states. Meanwhile, Li Mu—an unmatched strategist and the newly appointed prime minister of Zhao—has exploited Zhao's temporary truce with Qin to negotiate with other states without interference. Apparently without warning, Ying Zheng learns that armies from Chu, Zhao, Wei, Han, Yan, and Qi have entered Qin territory. Recognizing too late Li Mu's true intent behind the truce, Zheng hastily convenes his advisors to formulate a response to the six-state coalition army at their gates. For the first time in history, Qin confronts the threat of total annihilation and must deploy every available resource and strategy to avoid being erased from the map.