Lin Xiao, an ordinary young man from the modern era, unexpectedly travels through time to the chaotic Great Qian era, where warlords divide the land and northern barbarians wreak havoc. The moment he opens his eyes, he finds himself a low-ranking, unfortunate frontier soldier stationed at Stone Fortress, struggling with inadequate clothing and food and facing death at the hands of barbarian blades at any moment. At the brink of despair, he encounters Xiao Qingxuan, a female slave imprisoned in a prisoner-of-war cage and regarded as an ill omen because of her differently colored eyes. He saves her with nothing more than a single steamed bun, unexpectedly activating a system and the Divine Eye. Every enemy he kills earns him cultivation power and prestige, which he can exchange for cultivation techniques, weapons, and storage items. He soon discovers that Xiao Qingxuan is actually the Empress of the fallen Western Shu Kingdom, possessing a special Heavenly-grade Profound Yin constitution. The two rely on each other and pledge to stay together.