Before his death, his grandfather left only one sentence: "Guard the Nine Palaces and don't touch the formation below the city." Su Yan returned to the old street and opened a photo studio. The innate eye for qi can see through the evil spirits invisible to ordinary people; an ancestral compass can point to the twelve town objects buried under the city. Solving crimes, slapping people in the face, and collecting treasures, he went all the way from folk swindlers to a century-old mysticism, but found out that his grandfather died on the night of guarding the battle. What's suppressing the city? Who is digging? From the moment Su Yan put down the compass, he had no intention of looking back.