A strange fog swept across the southwest canyon, pushing two people with obsessions to the intersection of destiny. Shen Yan, the former captain of geological exploration, has been haunted by nightmares about the disappearance of his teammates for three years. The only clue is a half-piece of bronze fragment engraved with an unfamiliar coordinate system - that is the final puzzle piece of the legendary "Twelve Coordinates". Su Xunze, an ancient book restorer, discovered a silk book recording the secrets of coordinates among his grandfather's relics. The warnings in the text overlapped with his grandfather's abnormal behavior during his lifetime, pointing to the fog-shrouded no-man's land.
When the bronze fragments come into contact with the symbols of the silk book, the ancient mechanism hidden in the mountains and rivers is awakened. Twelve coordinates connect the ruins of forgotten civilizations like stars, and the twelfth coordinate is not only the key to unlocking the mystery of the fog, but also a trap that swallows lives. Shen Yan relies on the precise intuition of terrain survey, and Su Xun relies on the Feng Shui secrets in ancient books to make their way step by step in the secret realm filled with dense fog: the hexagram code is hidden under the collapsed hanging coffin plank road, a bronze compass appears in the dry river bed, and the same name as Su Xun's grandfather is written on the diary page of the missing teammate.
The fog not only blocks vision, but also distorts perception - they must distinguish between illusion and truth, and survive in the gap between stalkers and guardians. When the outline of the twelfth coordinate appeared in the fog, they finally discovered that the so-called coordinates were never geographical locations, but the ultimate test of people's hearts. The manipulator behind the fog has already written their destiny into the ancient coordinate system.
