The deceased is Li Guokun’s ex-wife Feng Xiaojuan. She was killed by Li Guokun fifteen years ago. Because the police arrived for treatment and survived in time, Li Guokun was identified as the primary suspect.According to preliminary speculations on the results of the trace inspection, the deceased's home may be the first crime scene.The police officer Ning Zhen at the scene aroused the vigilance of Cao Jin and Lu Fan. Cao Jin arranged for Taozi to investigate Ning Zhen secretly and observe carefully.
During the process, Cao Jin discovered that Ning Zhen was very sensitive to time.It turned out that Ning Zhen was always worried about his father's death and his mother's disappearance.The police began to do their best to search for possible body-spending.Ning Zhen returned to the police position and found suspicious people during duty.