From the major case in Chanzhou, to the horror of the ancient tomb, to the revenge of the drought demon, the mouse and cat tracked it all the way, and Gongsun accompanied him to help him. The ultimate purpose of the mysterious man, and who is the final controller of the case, there are countless clues, one after another, constantly cutting and adding chaos, pulling out all kinds of mysteries. Weird and weird Miao Gu appear one after another. What causes the Gu to mutate and who is controlling the Gu. Mouse and Cat fanfic, serialized.