In the turbulent years of the Republic of China, Lou Zhao, a retired emperor of the previous dynasty, has hidden his identity and settled in the countryside to reclaim wasteland and farm the land. There, he meets Yu Sui, a small-time merchant who travels far and wide. Together, they cultivate the fields and store grain to build a stable foundation. Using business as cover, they also investigate suspicious clues left behind by enemy agents, solving one espionage case after another in the hidden corners of the city and quietly protecting the peaceful livelihoods of the people around them.