Ye Qiu and the male protagonist traveled to an ancient country where there was famine and war, and the people were in dire straits. In order to protect their own interests, the old feudal forces tried their best to hinder them from promoting modern infrastructure and new ideas. If it fails, the protagonist will lose the opportunity to change the world and the country will return to despair. Within a limited period of time, they not only had to deal with implementation difficulties caused by the differences between modern knowledge and ancient environments, but also faced malicious rumors from feudal forces, causing public misunderstanding. Despite the successful implementation of infrastructure projects, there has been estrangement with some old friends. The betrayal and use of feudal forces has made the protagonist face a crisis of trust. But the protagonist relies on his wisdom and tenacity to work hard to change the fate of the country in the face of many difficulties.