Lin Han, a top criminal investigation expert, was betrayed by a mole and died in the line of duty. He was reborn and returned to the day he graduated from the police academy. With the memories of his past life, he decided to overthrow everything and start over, find out the ghosts in the police force, and change the fate of his comrades who died. But when he used his memory to prevent the first case, he was horrified to find that the murderer, the method, and the timeline had all changed. A black notebook that appeared mysteriously appeared with a warning in red: "The timeline has been reset, and the hunt has begun." Lin Han then realized that he was not reborn in the original world, but in a "mirror time and space" that had been tampered with by some kind of existence. What's even more frightening is that the inner ghost seems to have been reborn...
