Su Nian takes the agricultural book left by her mother to the northern frontier, turning white saline-alkali land into golden fertile fields. She plants golden potatoes, opens trade routes, repairs irrigation ditches, leads the villagers to live and work in peace and contentment, and also warms the border garrison soldiers. The Prince of Dingbei, Xiao Beixuan, goes from not understanding to admiring, studies farming with an open mind, and guards the northern frontier side by side with her. Partners like Xiao Shitou and Cuixi accompany them all the way. The barren land turns into a granary, and days become more and more prosperous.