Silent Evidence

Nancheng is an old city near the river that is humid, foggy and rainy all year round. In the past ten years, a very special type of unsolved case has appeared in Nancheng - "traceless murders". The murderer's method was so clean that it was strange: no fingerprints, no footprints, no weapon residue, no witnesses, and no surveillance records. The police repeatedly ruled it a suicide, an accident, and sealed the case as a cold case. But only one person knows: There are no perfect crimes, only ignored evidence.