Li Fei, a surgeon at Xining's Third People's Hospital, received a warning from Wang Baojun, chief of the Special Case Section 9, after his parents both died in an "accident": his parents did not die in a car accident, but were hunted; and the person who was taking care of him as a "kind grandmother" in his home was the predator disguised as a human.
Li Fei, whose world view collapsed, was forced to join Special Case Section 9 and awakened under the double torture of "hypoxia" and "mental dissociation". While maintaining his normal identity as a doctor, he must assist the Nine Sections in solving a series of "unnatural death cases." As the investigation deepened, Li Fei discovered that the mimic species had penetrated into every corner of the city, and even coveted some ancient geological energy underground in Xining.
After experiencing many hardships including the sacrifice of his mentor and the betrayal of his comrades (who were actually double agents), Li Fei no longer escaped. He used his medical knowledge and awakening ability to lead the ninth special case team to launch a desperate counterattack against the mimic species' mother body in the biting cold wind of the plateau, and finally tore apart the mimic species' "biological force field" over Xining and defended the city.
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