The story takes place in 1990, in Shuangyu River, a small city in Northeast China with a population of 20,000. Malignant incidents frequently occur in Shuangyu River, and the clues of these cases are inextricably linked to Shang Quanliang (played by Fan Wei), a worker in the security department of the thermos factory. Gold is attractive to people. When the legend of the gold in Laoyao Mountain surfaced, many evil forces "entered the game" to look for gold, and conflicts continued to escalate. When greed gradually gained the "upper hand", what kind of life will the human nature show? Many doubts, clouds and fogs...