Jianning Municipal Public Security Bureau of the criminal investigation detachment of the young vice captain Yan _, in the investigation of a frozen corpse, accidentally involved in the drug "blue gold" important clues, and found that in the case of the case of the police provided a lot of assistance to the police officer Lu Chengjiang, is actually three years ago in the Gongzhou plastic plant bombing case. The former second detachment of the Gongzhou Anti-Drug Corps, who sacrificed his life three years ago in the explosion of the plastic factory in Gongzhou, Jiang stopped. Yan _, Jiang stop tracking "blue gold", in the next serial kidnapping case, Hu Weisheng drug case, aconitine poisoning case and a series of cases, behind the hidden huge criminal gangs gradually emerged.