Lin Xi, a student at the University of Traditional Chinese Medicine, carries his grandfather's "Compendium of Materia Medica" manuscript. Due to the Millennium Resurrection Grass and the vision of thunder and lightning, he traveled through the beast world and possessed the dying female of the Green Wolf tribe. Her handbook is not omnipotent - the records are vague and life-consuming. When she first used herbs, she encountered setbacks due to improper dosage and pre-treatment. Instead, she relied on the witch's "herb sensing" (identifying activity and toxins) to resolve the problem.
The top warrior Cang is allergic to high-concentration animal power herbs, and Lin Xi customizes a medicinal diet for him; the promotion of astragalus causes an ecological crisis, and she uses "milk vetch rotation" to break the situation; the Red Tiger tribe uses "animal power symbiosis" to turn enemies into friends, and eventually leads the five major tribes to sign a peace covenant and become the "Guardian of Balance."
The Beast God invited her to cross realms to save a world with depleted herbs, but Lin Xi made a condition: stay for ten years to build a strong inheritance of herbs in the Beast World. This is a journey of guardianship in the beast world that uses herbal medicine as a blade to go against the routine in ecological balance and tribal bonds.