Three years after the advent of nuclear winter, former mercenary Lin Fu accidentally activated the causal system while surviving in the wasteland. Good deeds can accumulate causal value exchange capabilities, while evil deeds will cause backlash. From a lone traveler hunting mutant beasts, he gradually formed a "good cause" survivor base, using the law of cause and effect to counter the enemy in resource competition, power encirclement and mutation crisis - saving young children to lure the mutant wolf king to repay his kindness, and killing predators to be strangled by a group of mutant beasts. He eventually led mankind to find the fire to continue civilization in the rift of the apocalypse, and revealed that the cause and effect system was actually a "self-rescue program" left by ancient civilization to fight against the collapse of the world. The cool points focus on the immediacy of karma and retribution (you will be strengthened if you do good) and the pleasure of the villain's backlash (the villain will be punished on the spot for his evil deeds).
