Criminal Investigation Unit

A string of bloody murders shrouds the night in darkness. The killer remains at large, taunting the police. Forensic pathologist Yao Mingxuan, detectives Liu Haibo and Wang Hongfei, and policewoman Qin Xue work together, using their expertise to untangle the clues, pursue the truth, crack one bizarre case after another, and uphold justice. As they realize their own potential, they also undergo profound transformations in life.