Spy Movie: Chasing the Murderer in Old Cases

Investigator Lu Feng was involved in a complicated pursuit of the murder due to his university tutor's connection with the old case of the "Great Wall Files" ten years ago. Relying on his expertise in archival science and criminal psychology, he peeled off the cocoons of the cold reality, and at the same time explored the truth of that twilight era through evidence and flashbacks. Veteran detective Zhou Jianguo serves as Lu Feng's backing, providing key guidance and trust. Under the dual-line narrative, Lu Feng gradually approached the truth, but found that his every move was under the surveillance of the "Phantom". In the end, during an intellectual contest at a charity dinner, Lu Feng unveiled the real culprit, vindicated the wronged, and revealed the deep motives behind the case.