"Report, the autopsy results are out. There are no wounds on the deceased's body, and there are no signs of poisoning. The forensic examination results indicate that he died of natural causes." All three members of the family died overnight, but there was no way of death, but natural death. The criminal police team searched hard for three days without any clues. They decided to use the only surviving eldest son of the family as a breakthrough to find out the truth.
Concept: suspense story