Modern dual-degree master Zhao Xuan accidentally transmigrates into the Third Prince of the Great Qian Dynasty—a neglected royal heir. The moment he arrives, he’s framed by the Second Prince for 'harassing a palace maid' and plunged into crisis. Leveraging his modern knowledge, he repeatedly breaks free from traps, catching the Emperor’s attention—then amasses wealth by monopolizing the production and sale of 'Liu Wei Di Huang Wan' (Emperor’s Six-Ingredient Pills) and revolutionizing rock sugar and honeycomb coal.