When an unspeakable shadow envelopes the city, only the blood of the Old Ones can contend with it. Fang Xuanxuan, the forgotten descendant of the secret keeper, woke up from a mental hospital, and the world has become a crazy hunting ground. Pan Keqing, the sharpest knife in the Bureau, was ordered to eliminate all "abnormalities" until her gun was pointed at the man who claimed to "liquidate" everything. In a duel between the two powers, on the verge of sanity collapse, who is the real monster?