Hunted Across the Internet, I Use Profiling to Take Down a Serial Killer

On a blood-painted chessboard, seven pieces surround his photograph. Gu Cheng, a genius criminal profiler, is framed as a serial killer and wanted across the internet. His mentor's handwriting appears at a crime scene, while the killer "Zero" closes in step by step. He uses profiling to approach the truth, but every time he reconstructs a crime scene, he loses himself a little more in empathy with the killer. At the end of the hunt, will he find the truth, or an abyss?