Ye Huaijin, the shopkeeper of the Yin Paper Shop in Fuxing, Daning Dynasty, inherited his grandfather's "Zhenling" paper-tying technique, and was able to use paper figures to communicate with the underworld and restore the truth. Due to an order for "Crying Blood Paper Man", he was involved in an imbalance in the underworld and met Liu Yuetang, who guarded the Crossing Soul Bridge. The two cooperated to break the situation and exposed the internal power struggle of the Yin Division - the former City God had tampered with the rules of reincarnation in order to obtain the "Yin-Yang Balance Seal", which led to frequent abnormal phenomena in the world. The protagonist has no golden fingers and relies solely on his paper-making skills and wisdom. From old cases in the market to secrets in the underworld, he gradually uncovers the grand scheme across Yin and Yang, and finally unites all forces to defeat the conspiracy and maintain the balance of the Yin and Yang world. Highlights: With "paper-tying" as the core setting, the two realms of yin and yang are connected in series, the layout is interlocking, the game of human nature is combined with mysterious talk, and the growth of the protagonist relies on logic and experience.