Since the bloodthirsty plague broke out ten years ago, the Tianjing Dynasty has gradually fallen into decline. The people are destitute, food is scarce, and the survivors can only huddle inside the major cities. Outside the cities, only a handful of fortified settlements built by local villages remain. Everywhere else has been infected with the bloodthirsty disease, leaving the afflicted like zombies, with an intense craving for blood and an overwhelming urge to attack.