The child she raised with her own hands became the perfect serial killer. Ten years later, psychological profiler Shen Zhiyi returned to the scene of the crime, and criminal investigation team leader Ji Linyuan discovered that every murder was like a sacrifice, and the sacrifice was the tenderness she had given her. The physical evidence hidden by forensic doctor Bai Yan, the strange report by reporter Jiang Tang, and the diary of mental hospital doctor Zhou Zhao all point to the same truth: she is not chasing the murderer, but writing the final chapter for her own sins. She asked: Who knows the murderer best? The answer lies in the abyss planted by her own hands.
