On the edge of modern society, there are countless closed ancient places that have been forgotten by the world - isolated mountain villages, ancient Yinhe towns, abandoned temples and ancient villages, and mass graves. These places have been bound by thousands of years of folk customs and taboos, giving birth to the "Yin Rules": the rules of life and death condensed by old gods, mountain charms, earth-bound spirits, and the resentment of the dead. They are the survival rules for evil creatures and the life-threatening shackles of living people.
Those who violate the Yin rules will be killed by the evil spirit, and their death conforms to the folk taboos and curses; and those who can understand the Yin rules, use the Yin rules, and even break the Yin rules are called rule breakers. They can absorb the power of the Yin and control a taboo, but they will also be counterattacked by the Yin rules and become half-human and half-trick.
