Yichenxi, who was terminally ill and alone, never thought that his life would continue in another form. During a fatal elf attack, he miraculously survived and was brought into a shadow world hidden under the modern city - the Elf Management Association.
Here, he met the man who was as terrifying as the abyss, Shenzong Renshu. An elf cell transplantation operation relieved his pain, but also tied him to the association's chariot, becoming the most special "weapon" under Shenzong. His symbiosis with Hertos, the fire elf king, gave him the power to walk on the edge of the abyss.
However, Chenxi soon discovered that the order of the association was based on cold rules and hidden darkness. The "benefactor" he was loyal to seemed to be conducting some kind of crazy alchemy experiment using elves and even humans as materials. And when he met other Elf Kings, he began to doubt the meaning of his fight and saw another possibility for humans and elves to coexist.
