A century-old drought has swept across the land, food prices have soared, banditry has emerged, and troubled times are coming. Chen Xiaosui, a girl who awakened the "Medicine System of All Worlds", predicted the disaster, persuaded her family to abandon the village, and went deep into the Black Bear Ridge to survive with the top Orion Linye. After going through many dangers such as wild boars, wolves, and giant bears, they discovered natural caves and otherworldly valleys hiding underground rivers. Later, the Jiang family, Zhang family and other relatives and friends fled one after another and came to seek refuge. More than 20 people settled in the mountains and reclaimed wasteland. They accidentally discovered sweet potatoes, a high-yielding crop, and finally built a self-sufficient paradise in troubled times.
