1. The core setting of the story
1. World view: Under the surface of modern society, there is a heterogeneous space that follows "folk custom rules". Ancient taboos, sacrifices, and legends are all fragile balances reached between human beings and "unspeakable things". Once the rules are broken, "foreign objects" will come, swallowing life and sanity.
2. Female protagonist setting: Shen Yan, an unpopular local chronicle researcher, has a calm and rational personality, and is good at sorting out logical chains from ancient books, county annals, and oral legends. She has no superpowers. Her only advantage is her extreme sensitivity to folk rules and her strong psychological quality.
