The Dajing Dynasty has been in existence for three hundred years. Three hundred years ago, the "Disaster of the Northern Ruins" demons invaded in large numbers. Fortunately, a line of "ruin keepers" used nine ancient dragon bones to build a "Nine Towns Barrier" to lock the demons in the northern wilderness. Now that the three hundred years have expired, the barrier has been loosened, the dynasty's officials have become corrupt, and the entire line of people who keep the ruins have been slaughtered due to the royal family's fear, leaving only a few descendants living in seclusion among the people.
