Dr. Su Run, a doctor of agriculture, traveled through time and became a farmer's son in Liulin Village of the Great Yan Dynasty who had failed many attempts, but his fiancée Sun Fenglan broke off the engagement because he was too poor. Relying on his knowledge in his previous life, he developed osmanthus soybean milk, cultivated bean sprouts, and made bean sprout paste to help the villagers become rich. During this period, she met Zhao Ning, the princess who visited privately in Weibo, and gained her appreciation and help, defeating the difficulties of Zhang Song, the nephew of the chief minister. In the end, Su Run passed the sixth grade, was awarded a plaque by the emperor, promoted the new method of mulberry farming, and married Zhao Ning; but Sun Fenglan regretted it and died of illness, and the fate of Liulin Village was completely changed because of Su Run.
