Li Wei lied about being absent from an AA party due to the high cost. Unexpectedly, nine colleagues died tragically at the party, making him the number one suspect. During the interrogation, the dust-laden secrets of border diamond smuggling and the mysterious death of colleague Xiao Ma ten years ago were revealed. It turns out that this tragedy was the revenge of the guide's son Amu, while the old team leader Hu Biao faked his death to take everything for himself. Li Wei was forced to join forces with Amu to set up a trap to lure Hu Biao, and finally cooperated with the police to capture him. He confessed his past, received a light sentence for his meritorious service, handed over the diamond, and was finally redeemed, returning to a peaceful life with his family.
