In Yinhuai Town, the old locust tree is the treasure of the town and village and the source of terrifying legends. According to legend, ancient evil beings are suppressed under the tree. Every hundred years the seal is loosened, and the evil spirits will take the opportunity to cause harm to the world. The townspeople have guarded the seal for generations, but they don't know that danger is quietly approaching.
Young Orion Chen Yu was living an ordinary life, but due to an accident, he was involved in the whirlpool of strange news. One day, the old patriarch of the village died suddenly and miserably, leaving a strange snake-shaped blood mark on his chest. During Chen Yu's investigation, he accidentally discovered that the old patriarch had secretly been looking for a bone flute engraved with runes. It is said that playing the bone flute can control people's hearts and awaken sealed evil beings.
At the same time, the mysterious Taoist Su Ran and the Feng Shui master Zhang Zhenren came to the town. They brought shocking news: the seal was about to expire, and Yinhuai Town was in danger. The three team up to explore the truth and discover that the bone flute is related to the believers of evil things. These believers try to awaken evil spirits and rule the world.
As the investigation deepened, they encountered many crises. The evil believers set traps and sent controlled zombies and strange monsters to stop them. During a fierce battle, Chen Yu and others discovered that there were cracks in the seal of the old locust tree, and the power of evil things continued to pour out. In order to repair the seal, they found the taproot of the Zhenyin tree based on clues from ancient books, and even the blood and cinnabar paintings of their relatives.
