Forget it. Chen Mo has listened to these three words for twenty-three years. They forgot the rain that day, the blacked-out transcript, the look that a young man who had been wronged looked at him through the car window, and they also forgot that many years ago, there was a person like him who refused to let it go. Later, everyone forgot about that person, as if he never existed. But he remembers. The city wakes up at the same time every day, and everyone repeats the same day. Only he, in the sound of rain at 5:47, remembers every detail that was changed in the 48th cycle. What he was investigating was not a case. He is fighting against "forgetting" itself. This time, he won't let it go.