An imaginary version of the end of the ancient "Dayin Dynasty". A sudden natural disaster "black dust obscures the sun", causing global temperatures to plummet and years of darkness, similar to a volcanic winter. Crops died on a large scale, social order collapsed, morals declined, and human beings entered the "barren years" in which they fought each other for survival. This is an extreme living environment with no zombies or supernatural powers that purely tests human nature.
What makes the protagonist stand out: no golden fingers. The heroine's "plug-in" is her professional knowledge and psychological quality as a top heroine. Including but not limited to: in-depth knowledge of human anatomy (used in combat and medical treatment), toxicology (identifying and utilizing poisonous animals and plants), forensic science (tracking, investigation, logical reasoning), basic botany, and extraordinary calmness and strong psychological endurance developed by dealing with death all year round.
