Lin Yu, a top modern mechanic, accidentally traveled to the ancient Yunlan Kingdom due to a bizarre experiment. War is raging here, people's livelihood is in ruins, the court is controlled by various forces, and the people are miserable. Lin Yu, who had just crossed over, was hunted down as a spy because of his unknown identity. After escaping from death, he determined to use modern mechanical knowledge to change the world. However, the backward craftsmanship and materials of ancient times, as well as the resistance of conservative forces, all became obstacles on his way forward. Just as he was gradually gaining a foothold and preparing to display his grand ambitions, neighboring countries suddenly launched a war, and Yunlan Country was in danger. Can Lin Yu use mechanical power to save the country amid internal and external troubles? What kind of legend will he write in this strange era?
