Shen Zhaoyan was once the ace of criminal investigation, but that night he personally deleted the key testimony, and he has since retired with a stigma. Five years later, a series of murders reappeared, and the victims were all related to the old cases. The only witness actually wrote his name in prison. Lu Jiming, the new leader of the serious crime team, came to the door with an anonymous file - only he could restore the surveillance that night. The two confront each other on the edge of truth and betrayal. One wants to clear his name, and the other wants to uncover the real murderer. At the moment when the testimony is erased, no one knows that what really should be deleted is the ghost in the memory of the living person.
