Criminal Investigation Department

Murders keep happening, and darkness shrouds the truth. The killers remain at large, taunting the police. Forensic doctor Yao Mingxuan joins criminal investigators Liu Haibo and Wang Hongfei, along with the beautiful policewoman Qin Xue, to work together. Drawing on their professional expertise, they carefully unravel the clues, pursue the truth, solve one bizarre case after another, and uphold justice. Along the way, they realize their own potential and undergo personal transformations.