After their triumph in the Sanyou campaign, the Qin army, led by the 1,000-Man Commander Xin, moves closer to fulfilling King Ying Zheng's vision of uniting China. With control over a crucial part of Wei, Qin now aims towards the eastern warring states. Meanwhile, Li Mu, a brilliant strategist and the new prime minister of Zhao, seizes the opportunity of a truce to strengthen alliances. However, Ying Zheng is caught off guard when armies from multiple states breach Qin's borders. Facing a dire threat, Qin must strategize to counter the six-state coalition army, risking total annihilation for the first time in its history.