Worried that he may be assassinated, Lin Jiulang refuses to attend the banquet and assigns Ji Wen to find out everything about Xu Bin, the Security Office researcher. Li Bi follows Xu Bin to a secluded factory in Huaiyuan district, and discovers to his surprise that this factory of Xu Bin’s is a paper mill hidden in a secluded location. Xu Bin tells Li Bi the truth. Touched by his sincerity, Li Bi is no longer suspicious of Xu Bin. Lin Jiulang’s investigation reveals that He Zhizheng’s dim-witted son once secretly gave Xu Bin a large sum of money, which leads him to suspect that He Zhizheng is also involved in the plot.
林九郎担心遇刺，不肯赴宴，并派吉温去查大案牍术缔造者徐宾的底细。李必跟踪徐宾来到怀远坊一处隐秘的工坊，李必赫然发现徐宾这座工坊是一个隐秘的造纸坊，徐宾告知李必实情，李必感怀其痴，打消了对他的怀疑。林九郎查到何执正的傻儿子曾秘密给过徐宾一大笔钱，至此怀疑何执正也牵涉其中。张小敬只身拦截狼卫大车，但三辆大车几乎逃出了张小敬徒步追击的范围。
