Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

In a luxurious villa, 13 people mysteriously died under bizarre circumstances, with no clear signs of external force. Lin Xuan, a criminal investigator, discovers peculiar details: one person's fingerprints are missing, victims seemingly committed suicide without obvious coercion, and deaths range from gas poisoning to suffocation by candy. The victims include a wealthy businessman, a teacher, a criminal fisherman, and a nurse-boyfriend pair. Despite extensive forensic investigation, the team can only conclude that either the victims were forced into suicide or a killer methodically murdered 12 people before potentially taking their own life, leaving behind an inexplicable and chilling crime scene.

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