After transmigrating into Li Yin, the son Taizong Emperor Li Shimin liked least, he planned to use his status as a prince to woo a few beauties of the Tang Dynasty, then live the good life, doing nothing until the end of his days. But the previous Li Yin, a complete rascal, left him not only a noble title but also a mountain of messes. His prospective princess consort's low birth made him a laughingstock among the aristocracy, the princely estate's finances were on the verge of bankruptcy, and his mother had given everything for him, living a life of hardship in the palace...
To clean up the mess left by the former Li Yin, he has no choice but to trade tea, brew wine, and make cement. One new invention after another appears in the Tang Dynasty ahead of its time. In the process, Li Yin not only changes how the world sees him, but also, to his surprise, unleashes the bloodthirsty beast called "capital," which soon grows beyond even his ability to control...