Seven years ago, the real culprit of the "Rainy Night Butcher" serial case was at large, and the only surviving victim, Tang Nuoxi, returned from hell and became a criminal profiler. Seven years later, a case using similar tactics reappeared. She volunteered to join the task force, only to find that the person in charge was Feng Chenran, the detective who had personally "closed" the case and indirectly led to the death of her family. When the Avengers and the "malfeasors" were forced to join forces, the fangs of the truth were aimed at everyone.
