In 2749, fragments of a stray black hole codenamed "Lisutan" passed through the solar system. The gravitational tide tore apart the earth's magnetic field and the moon. Massive tsunamis and crustal collapse swept across the world. 97% Of the population of the old human civilization perished. The surviving people hid in underground bunkers or orbiting space stations, struggling to survive in the wasteland.
The strength of the earth's magnetic field dropped sharply to 12% of its original value, and cosmic rays and solar winds penetrated continuously. Living creatures exposed on the surface will be burned by radiation within a few hours, and their genetic chains will be broken. A very small number of humans survived the radiation, and their bodies underwent special genetic mutations - they were divided into two categories, sentinels and guides.
Purpose: to carve a path of salvation for them in the darkness
