The modern warrior king Sai Hao's soul penetrates the grassroots of the Qin Dynasty, and he struggles to survive with his weak wife at the beginning. Faced with oppression by his clan members, rampant banditry, and exploitation by the court, he relied on modern combat power and wisdom to overcome the situation, protect the villagers, build a base, and unexpectedly won the favor of the princess. When the imperial court came to borrow 50,000 elite soldiers, he refused with a smile: "The princess asked me to carry on the family line," and his counterattack became a legend in troubled times.