Introduction: Chang'an City was instantly flooded by a sudden thick fog, and people fled in panic. The bad man Xiao Cheng guarded the weak prince and was trapped with the civilians, waiting for the fog to dissipate. However, the dense fog did not disperse as expected, and the people who walked into the dense fog never returned. The sky-shaking monsters in the dense fog gradually revealed their hideous features. Xiao Cheng fought hard to protect Chang'an.