Xiao Song rescued Sang Chen, and immediately saw Ran Yan helping Su Fu to take medicine with anxiety. He didn’t feel it. He turned and took Sang Chen to the school to get the oil-paper umbrella, but he was found to be taken away first. Sang Chen said that the weapon was a short-handled tadpole, and based on the memory, the marks on the umbrella bones of the oil-paper umbrella were drawn to spell the word “Daliang Warehouse”. Ran Yan and Xiao Song split up for clues, and found that the four missing persons used their respective professions to connect with each other and participate in grave theft. When the two tracked down to find a Han dynasty tomb, they suddenly discovered that the four missing persons had been sentenced to death by the murderer and died tragically in the tomb. Xiao Song and Ran Yan found the marks and fragments of the official knife on the coffin, so the two inferred that the killer came from the county government.