Today, criminal investigation technology continues to develop, but the complexity of human nature and the intertwining of grievances and resentments make case investigation full of challenges. A murder case! Detective Jiang Chen pursues the truth and leads to an old case that caused the accident ten years ago! Discovering that a ten-year-old case was actually related to the current case, Jiang Chen fell into a desperate situation and finally discovered that the evidence had been hidden at the starting point...
