During a severe drought in the Great Ning Dynasty, Han Shoutian, a widowed grandfather, accidentally discovers that he can travel between ancient times and the modern world through a dry well while trying to save his dying granddaughter. He brings back food, medicine, seedlings, and agricultural supplies earned from working at a modern noodle shop. First, he saves his family and grows high-yield crops, then enters a mutually beneficial business arrangement with Zhou Jianmin, the modern noodle shop owner. When the greedy Shopkeeper He conspires with the county magistrate to confiscate his property and grain under the pretext of accusing him of using demonic grain to rebel, Han follows Zhou Jianmin's advice and has his two sons present the miraculous grain and a glass Buddha to the commandery governor and an imperial inspector. Ultimately, the miraculous grain receives imperial recognition, corrupt officials and unscrupulous merchants are punished, and Han Shoutian is awarded the honorary title of Agricultural Promotion Commissioner, helping spread high-yield crops throughout the land.