Silent Inscription

Chen Yan, 32 years old, is the former leader of the serious crime team of the criminal investigation detachment. He resigned due to injuries from an old case. He was anonymously entrusted to go to Beilu. He has strong logical deduction ability and observation ability. He insists that there are no big or small clues and no blind spots in logic. Within seven days, five serial secret room murders occurred in Beilu. The victims were all directly related to an unsolved "Missing Case of a Beilu Girl" ten years ago.