While investigating an ancient painting that has been stolen, Luo Jian, who heads the criminal investigation team, crosses paths with genius university student Zhuang Wenjie who is from a family of thieves. The unlikely pair work together to crack the case.

When a murder involving a deadly bullet ant puts him under suspicion, insect toxicology graduate Tan Jingtian teams up with a forensic doctor and police detectives to clear his name, uncover hidden truths, and track down a killer who has evaded capture for years.

In a quiet coastal town, two mysterious murders disrupt the peaceful lives of single mother Li Xiulan and her daughter Li Yan, as an unexpected police investigation draws them into a chilling web of secrets.

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