An old case of serial disappearances many years ago was hastily closed. The evidence was unclear, and Gu Songfeng had been secretly pursuing it. New and bizarre murders have occurred one after another in the city. An old silver maple leaf badge is left on the deceased, which is exactly the same as the mark of old cases many years ago. The police clues were stuck, and the bureau commissioned external cooperation. Gu Songfeng was forced to find Xie Changqing, whom he had not seen for a long time. Former partners join forces again. As the investigation deepened, they discovered that the case that had been closed that year was an artificial cover-up. The murderer had been dormant in the dark and was now committing crimes again. Past misunderstandings, the hidden secrets of their separation, and the knot hidden between the two are revealed one by one with clues. Encountering threats, clues being tampered with, and witnesses missing along the way, the two are suspicious of each other and can only rely on each other. In the dangerous pursuit, they trust each other again, fight against the forces behind the scenes, and finally uncover the murderer.
Mission: No matter what the situation is, justice will never perish