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[No CP-Unit Criminal Investigation-Based Reasoning] A bizarre "chimeric version" corpse was found in Shengxin Hotel and Resort. The torso of the deceased was missing. The only evidence was the "x" marked with blood on the ceiling of the room. Some said it was a curse, some said it was a mysterious organization, but Han Yuechuan, the captain of the serious crime detachment, remembered a serial murder case that happened more than ten years ago. The same modus operandi and similar victimization plots are almost replicas of different time and space. This time, the secret of Room "x" will be completely revealed...