Fifteen-year-old Li Xiangdong follows his grandfather, Li Laobie, into the Changbai Mountains to forage for mountain produce and wild ginseng, carrying on the older generation's craft of respecting nature and abiding by the rules of the mountains. During one ginseng-gathering trip, they encounter the local bully Liu Dabangzi, who tries to steal their ginseng. The grandfather and grandson use their mountain knowledge and wits to escape danger. Afterward, under his grandfather's guidance, Li Xiangdong diligently practices identifying medicinal herbs and locating ginseng, solving one mystery after another and venturing into dangerous places. He not only protects the mountain's natural resources but also helps expose wrongdoers, eventually growing into a responsible new-generation mountain forager who understands and respects the rules.