Li Feifan, the poorest prince consort in the entire capital, uses a family heirloom book, The Book of Ingenious Streetwise Schemes, and his shameless audacity to introduce hunger marketing, free samples, and franchise chains to ancient times. The Ninth Princess goes from looking down on him to eagerly wanting to become his business partner, and the two make money while constantly bickering. The father and son of the Minister of Revenue take turns sabotaging their business—smashing their stall, cutting off supplies, filing joint complaints, and sending undercover spies to steal their trade secrets—but every scheme is turned against them. No time travel, no rebirth: just a hilarious, fast-paced ancient-world business comedy full of satisfying reversals. Every episode ends with an unexpected twist. Life is like that—just smile and move on.