An engineer in the 21st century is transformed into a down-and-out prince. He uses scientific knowledge to strengthen the country, but is regarded as a "witchcraft". When the enemy troops came to the city, the civil and military officials of the court knelt down and begged him to take action. He only asked: "Who is the monster now?"
This is a story about a prince's strategy of "rising to power" by relying on modern knowledge. The main line is clear: the protagonist Shen Huai, a modern civil engineer, is disguised as the ninth prince under house arrest. In order to save himself, he used cement, blast furnaces and other "black technologies" that transcended the times to transform the fiefdom and make the country rich and powerful. But his astonishing talent also attracted the hostility of the court forces headed by Taishi (a conservative person with facial makeup who represented the old order), and he was denounced as a "monster". In the end, when the country was in crisis, he proved himself, but he also fell into the ultimate game with imperial power.