In ancient times, a virus born from a dream contaminated the world, setting its twisted history in motion.
The renowned Duke of Zhou, Wei Zheng, and Bao Zheng, along with the Three Sovereigns and Five Emperors, ancestors of humanity, were all infected by the virus.
Slaying dragons in dreams, judging the underworld at night: the legends in these dreams are real. Those who know the truth keep silent, while those who hear of it call it ominous.
From ancient times to the present, the Dream Divination Classic, Classic of Mountains and Seas, the works of Lovecraft, and the Book of Changes have all hinted at the virus's history. After thousands of years, the threat of the dream virus has reached the cities, and its new victims call themselves Nightmare Walkers!
