In a world where neon lights of blue and purple shine beneath a dense steel sky, at the forefront of data streams, this is a world after the technological revolution, a boundary between reality and illusion. Steel and flesh, past and future coexist here, where the surface world and the hidden world stand side by side, and everything before you seems like a wall of time. Darkness gradually envelops. But my friend, you must understand, we cannot meet darkness with gentleness; we must use fire.