Immortal cultivators rely on elixirs to survive, but little do they know that elixirs themselves are poison.
In the winter of the 377th year of the Qingwu calendar, spiritual energy has declined for three thousand years, and the world of immortality has long been inseparable from elixirs.
But no one knows - every pill is eating away at the longevity and sanity of the person who takes the pill.
Three hundred years ago, Hua Xiangrong, the leader of the Qixia Sect, discovered this secret, but chose to use the trick to secretly control the entire world of immortality with the poisonous cultivation method.
Su Heng, a sixteen-year-old medicine boy from the outer sect, has poor spiritual roots and cannot follow the ordinary path of cultivation. A violent death case involved her in the whirlpool - the dark purple powder in the deceased's fingernails pointed to the banned drug "Bone Corrosion Powder", and all the evidence pointed to her. In a desperate situation, Su Heng felt severe pain at the tip of her tongue, and strange lines appeared in the spiritual energy of all things in front of her - she could "see" toxins.
Ordinary poisons are like spider webs, erysipelas are like annual rings, and heart poisons are like flash points.
Su Heng didn't understand what ascending meant. She only knew who was lying, which meridians were corroded by poison, and which elixir contained human life. From proving her innocence to uncovering the shady story of Qixia Sect's three-hundred-year-old poison cultivation, from a medicine boy to a judge who uses poison to enter Taoism, she used her mortal body to fight her way through the chess game of the world of immortality.
Don't cultivate immortality, just seek truth.
