The background of the story is in 2975. At that time, the world was highly AI-enabled, and there was little contact between people. Learning was transmitted through brain-computer interfaces, and survival nutrients were provided through incubators. A global deadly virus caused the extinction of living things, leaving only machines running alone. The consciousness of the male protagonist Liu Hao was in a holographic simulation game called "Dream". When he learned the news of his physical death, endless fear accompanied him throughout his gaming career.
