Chu Yuan, a construction-site safety supervisor and contractor in his previous life, suddenly dies from overwork and transmigrates into the body of the ninth prince of Great Chu. He carries the Heavenly Craftsman's Measuring Ruler, which allows him to see through construction hazards and financial discrepancies. Due to a special karmic condition, he can return to the modern world and claim a retirement fortune worth hundreds of billions only if the imperial court executes him by beheading and strips him of his identity. Desperate to die as soon as possible, Chu Yuan publicly demolishes a shoddy city defense embankment and beats corrupt officials. Unexpectedly, he uncovers a massive corruption scandal and saves hundreds of thousands of people, who instead hail him as an incorruptible magistrate. The emperor draws him into a whirlpool of political intrigue. Chu Yuan decides to crush every opposing faction with sheer force, reform the realm through his expertise in infrastructure, quell a military mutiny and border threats, and ultimately bring an end to the age of chaos and take control of Great Chu.