Everyone says a demoness has arrived in the Six Prefectures, killing without a trace.
Only Li Zhi'en knows this is just the beginning.
The "medicine" waiting for her in the imperial mausoleum is the true curse of immortality.
Li Zhi'en, the calmest physician of Moon Record Mountain, concocts a forbidden poisonous medicine in the imperial mausoleum to save her younger brother.
Black patterns creep like vines across her collarbone, fangs pierce her lips, and the "elixir of immortality" she prepared herself is corroding her from the inside out.
When the powerful of the Six Prefectures mock the medicine-bearers as livestock, she smiles and drives a poisoned needle into her own heart.
If she cannot be cured, then she will become the deadliest poison of all.
Only when she sees fangs growing in the mirror does she realize that the medicine's true side effect is not death, but becoming someone else.
Li Zhi'en realizes she may no longer be Li Zhi'en.
(The story takes a wild turn later: after Chapter 60, she is trapped in a monstrous body, while he walks the world in her form, seeing its corruption through the eyes of others.)
