Xiao Yishui, an antique dealer in Chang'an, appears to be as timid as a mouse, but in fact possesses the "Turtle Breathing Technique" and a deductive turtle shell that can predict disasters. In order to investigate the unsolved case of serial nightmares, he set foot on the Silk Road with a caravan, but met Yue Rou, a Turkic guide with the blood of a war demon. When Ghost Cry Valley is attacked, he trades his life to save Yue Rou, and discovers that her bloodline is both the source of divine power and the root of disaster. The two arrived at the legendary Dayun Temple and encountered a deadly trap set by the thousand-year-old dream tapir. Xiao Yishui relied on the tortoise shell to avoid murder time and time again, but was shocked to realize that every "correct" deduction was pushing Yuerou into the abyss. When the mastermind behind the scenes emerged, he realized that the ancestral treasure that protected him to this day was itself a unique weapon forged for hunting down war demons six hundred years ago.
