When AI replaces human jobs on a large scale, billions of people around the world simultaneously fall into "existence value anxiety." This same-frequency mental fluctuation lights up a huge WiFi hotspot in the universe. The world of Cthulhu received this signal and began "protocol docking" - the invasion was not a physical arrival, but an information penetration. The Old Ones are essentially high-dimensional information entities that are "overlaying" Earth reality with Cthulhu's rules. The protagonist Jiang Xun, a former algorithm engineer who was laid off by AI, accidentally discovered that he could "see" the underlying code of reality.