I, King of Criminal Investigation, Solving the Rainy Night Serial Murders from the Beginning.

Summary

A theft case escalates into extortion when Huang You Wen receives a threatening call demanding 300,000 to prevent the release of compromising video footage. Despite his fear, he records part of the call and cooperates with Officer Guan Feng, who determines that the case is more serious than initially thought. As the investigation unfolds, they discover that Huang You Wen's relationship with three women is suspicious, and evidence suggests one of them, Li Lan, might be involved. A processed recording reveals the caller is female, heightening suspicions. Traces of ink pad residue found at the scene further implicate the suspect, indicating a calculated plan.

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