Su Yan, a modern-day transmigrator, unexpectedly becomes the notorious playboy of the Duke of Su's mansion in the Great Qian Kingdom. He abandons his former gambling-addicted ways and uses modern knowledge to invent a hand-cranked fan and establish a trading company, which is flooded with orders from the moment it opens. Even shrewd foreign merchants are willing to pay premium prices for his goods. Li Zhaoning, the eldest legitimate princess, who is determined to break off her engagement and go into business, gets acquainted with him through a clash, and the two form a business partnership. Little do they know that a conspiracy against him has already begun to unfold quietly within the imperial court. A contest over wealth and destiny is about to begin.