Datang: the Granary Is Full, and Li Shimin Is Crying!

Su Qingfeng, a modern farmer, travels through the Zhenguan period, using sweet potatoes and peppers to break the famine situation in drought years. He accidentally encounters Li Shimin, who is incognito to investigate the disaster, and Princess Li Lizhi of Changle. They become connected through a bet. With their agricultural skills and poetic talents, they win the favor of the emperor and the empress. Not only do they provide crops to help the world, but they also write a legend that transcends identities in the dealings between the court and the market.