Modern man Lin Du transmigrates into the body of Zhang Sanlang, a low-ranking clerk at the Juancheng County Office. The original owner was secretly murdered after discovering forged land deeds. Upon awakening, he sees the cold-hearted nature of the Zhang family and uses the opportunity to sever family ties and divide the household, securing an old house and ancestral farmland. Drawing on his modern knowledge and abilities, he rises to become a senior clerk in the household registration office. While raising his children and helping his neighbors establish a stable life, he also investigates the truth, going head-to-head with corrupt criminal office clerk Kong and local tyrant Chen Youde. From exposing forged deeds and recovering unpaid taxes to investigating murder cases, he ultimately brings Chen Youde down and builds a new life for himself in an ancient county town.