The Qingchuan Mountains are shrouded in clouds and mist, hiding the secrets of the thousand-year-old town and the shadows left over from the Republic of China. A retired history teacher died in a locked study room. An ink-stained scratch on a Republic of China military uniform button involved disputes over family secrets and cultural relics; a strange disease broke out in an ancient town in the mountains, and deadly toxins were hidden in the water source of the spiritual spring. Behind it was a tunnel conspiracy that pointed to the arsenal ruins. The criminal investigation captain Lu Zeyan was ordered to face the danger, and he peeled off the cocoon on the land of Qingchuan shrouded in rain and fog. From the Gu family's ancient house to the abandoned military camp, from the disappearance of the archaeological team to the destruction of the "Shadow" organization, every murder case was intertwined with historical grudges and human greed. When the dusty secrets are revealed one by one, can justice penetrate the fog and illuminate every darkness in this land?
