Main plot: In the last years of the Chu Dynasty, a once-in-a-century natural disaster swept across Kyushu. Earthquakes, cold waves, and locust plagues followed one after another, and civilization collapsed. Su Wan, the daughter-in-law of the Su family, was originally a modern agent and a top academic. After traveling through time, she pretended to be a fool for three years to avoid being exposed. At the beginning of the disaster, she activated the "Academic System" - she has a photographic memory, can gain knowledge and skill rewards by reading books, and has super research power. She secretly hoarded supplies in the name of "Silly" and rescued the seriously injured prince Xie Yan from an avalanche on a cold night. From testing each other to joining forces, the two established a secret base based on the old residence of the Su Mansion. Su Wan used the knowledge unlocked by the system such as agricultural improvement, salt and iron making, medical skills and epidemic prevention to lead the survivors to rebuild. At the same time, they fought against the old aristocratic forces that had been blackened due to competition for resources. In the end, before the ultimate natural disaster "Burning the Plains", Su Wan integrated the remaining Kyushu tribes and opened a new era of civilization.
