In the year 2077 of the Blue Star Calendar, the "Red Mist Catastrophe" came. Within seventy-two hours, 90% of the world's human beings mutated, or became "abnormal bodies" that drink blood and hair (classification: low-level fanatics → mid-level bone spurs → high-level tyrants → leaders Main-level disaster beasts), or are eroded by the red mist and become irrational "walking corpses"; surviving humans hide in isolated cities of reinforced concrete. The red mist blocks the sun, plants wither, water sources are polluted, food is scarce, order collapses, and humanity is exposed.
This disaster was never a natural disaster. It was the "Blue Star Screening Experiment" of an extraterrestrial silicon-based civilization. Hidden in the red mist were "Source Crystals" that could slowly evolve human physique, and "Brother's Nest Spores" that could give birth to aberrations. Human survival has always been a two-pronged game: fighting against the fangs of aberrations externally, and fighting against the greed and betrayal of the same kind internally. The core of survival has never been brute force, but a clear mind, careful strategies, and companions who can be trusted to support you.