The nations are locked in a chaotic war, with rival powers vying for supremacy. Xiao Yi, regent of Great Qin, relies on his illustrious military record and peerless martial skill to clear away the empire's enemies, step by step, and unite all under heaven. At last, after accomplishing the unification of the empire, Xiao Yi lays down his burdens, retires from public life, and wanders the world with his wife, Yuan Qingrou, leaving their past behind.