In a world after a technological revolution, where neon lights paint the sky in shades of blue and purple under a dense, steel-like sky, at the forefront of the data torrent, lies the boundary between reality and illusion. Steel and flesh, past and future. Here, the surface world and the underworld coexist, and everything before us seems like a time wall just ahead. Darkness gradually envelops. But you must understand, my friend, that we cannot confront darkness with gentleness, but with fire.