"In the third year of the red fog, 90% of the earth's surface The area was covered by corrosive miasma, and the former city was reduced to a nest of mutated creatures. Human survivors huddled in underground bunkers and high-altitude floating islands. Ling Yi, a former geological engineer, lost his beloved scientific research team due to betrayal and wandered alone in the ruins with half of a mysterious obsidian fragment. When he accidentally rescued Su Xiao, a girl with rare purification abilities, the fragment suddenly awakened, revealing energy fluctuations that were homologous to Red Mist.
As the two walked together, Ling Yi discovered that the red mist was not a natural disaster, but the product of an out-of-control "purification program" left by ancient civilizations. Obsidian fragments hide the key to restarting the world, but they also attract the covetousness of all forces - the ruthless official alliance "Ark" wants to take it as their own to consolidate their rule, the fanatical "Purifier" sect attempts to use the fragments to accelerate human extinction, and the "Tombkeepers" lurking deep in the fog layer guard the more terrifying truth.
In the repeated torn apart of trust and betrayal, Ling Yi must regain his confidence in others, unite scavengers, resistance forces and other sporadic forces, cross the "corrosion zone" where mutated creatures are rampant, decipher the geological code in the obsidian, and make a choice before the red mist completely swallows up the last piece of pure land: restart the world, or live in symbiosis with this broken apocalypse? "
