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In the middle of the night, Officer Nie accidentally recovered the body of a female named Cheng Anyu during a police dispatch. Family members came in droves and refused to believe that Cheng Anyu committed suicide in front of the suicide note. Officer Nie was ordered to chase the murderer. After many twists and turns, he found people related to the deceased one after another. However, the deeper he got to know, the truth about Cheng Anyu's death became more and more confusing...