Twenty years ago, an abnormal celestial phenomenon like an aurora appeared over major cities around the world at the same time, which was called "the arrival of the great source." From then on, the air was filled with energy particles called "source matter". Due to exposure to high concentrations of Essence, some humans have mutated genes in their bodies, activating special organs or metabolic systems that can absorb and transform Essence. These people are called "awakened ones." The preparation prepared by the awakened person through a special formula and using natural materials and earthly treasures to allow people to gain supernatural abilities is called a secret medicine.
