Origin of the disaster: In 2035, "Pathogen Zero" released from the Arctic tundra spread globally under the influence of monsoons. The virus spread through the air and rewrote the human genetic chain. After an incubation period of 72 hours, infected people would develop symptoms such as skin keratinization, silvery-gray pupils, and increased aggression, and eventually transformed into "Ember People" who spread through bites. After 90% of the world's population was infected, the survivors established 17 "lighthouse shelters" led by the military, scientific research institutions and civilian armed forces within three months. However, the production capacity of the core energy "antimatter battery" could only be maintained for three years.