In the underground city where decay and rebirth are intertwined, "species mutation" has become a constant rule. Xuanyin, a man who once roamed the surface as a human, has now lost his original form in the torrent of changes, leaving only a body mixed with scales, feathers and memory fragments. His heart burns with the obsession to find the lost treasure - the mysterious relic that is said to be able to reverse mutation and awaken the true self. But in this deep labyrinth, every evolution is accompanied by the tearing of the soul. Travelers are either friends or enemies, and it is even difficult to tell the truth from the false. On the road to pursue the treasure, Xuanyin's conflict with self-alienation continues to escalate, and the boundaries between body and mind become increasingly blurred. The story is set against the background of beautiful mutant creatures and chaotic ecological order, showing how Xuanyin struggles between bizarre evolution and self-salvation, and reveals the glimmer and shadow of human nature in the reorganization of species. The dungeon is not the way back, and the lost treasure is not the end. Only by facing the deepest changes in your heart can you find the meaning of your own existence.
