In ancient China's Warring States period, Xin, once a servant, rises through the ranks with the ambition to become the greatest general under heaven. Fighting beside King Ying Zheng of Qin—who aims to unify China and end the turmoil—Xin commands his own unit, the Fei Xin Force, on the battlefield.
Having reclaimed power from the influential Chancellor Buwei Lü, King Ying Zheng begins establishing foundations for a new, unified legal state with support from key allies like strategist Changping Jun and legalist Li Si.
As Qin launches a campaign to seize territory from the state of Zhao, their advance is halted by the brilliant strategist Li Mu. In response, Changping Jun devises a bold plan: bypass Zhao's defenses and strike at the key city of Gyou, near Zhao's capital.
To execute this risky maneuver, a powerful coalition army is formed—led by tacticians Ou Sen (Wang Jian), Kan Ki (Huan Yi), and the warrior queen Yo Tan Wa (Yang Duanhe). Joining them are the next generation of Qin commanders: Xin's Fei Xin Force, Mou Ten (Meng Tian)'s Gaku Ka Unit, and Ou Hon (Wang Ben)'s Gyoku Hou Unit, each operating independently.
The fierce battle for Gyou begins, as the future of Qin's unification hangs in the balance.