Psychological Mysterious Case.

Summary

The text is a suspenseful crime narrative involving Su Yun and Song Ao Yue investigating a series of murders committed by Han Dong using infrasound technology. Han Dong killed four people, including his sister Fang Fang's associates, by causing hallucinations through sound waves. During interrogation, he quickly confesses but seems to be protecting an unknown accomplice. Su Yun and Song Ao Yue suspect this accomplice has insider knowledge about the case. The story involves psychological manipulation, mysterious supernatural elements, and hints at a deeper conspiracy behind the murders.

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