The last time Su Fang, a forensic doctor from the Lincheng Bureau, made a normal police call was to inspect a strange corpse in the rust area. After entering the three square kilometers of the old city, he never came out again. There is an iron law in the Rust Zone: the total population is constant at 999. If someone dies or escapes, new people will be added within 24 hours. But what was added was not a living person—it was a cognitive mimicry overwritten by memory, carrying indescribable pollution. Su Fang soon discovered that he had the ability to look back in time. The price is memory. Every time you rewind, a piece of your mind disappears forever. He couldn't remember the victim's face, couldn't remember his address, and even began to doubt whether the name "Su Fang" belonged to him. What's even more deadly is the "mirror eclipse", which comes around every 49 days. Backdating failed that day, the rules were loosened, and the outside world could penetrate. But those killed on that day will be completely deleted from the causal level, and even the replenishment mechanism cannot be resurrected. There are six hours left until the next mirror eclipse. There were only three lines left on Su Fang's notepad: "Don't trust Zheng Yanqiu." "This is the fifth time Lu Ciwei added it." "Kill Huo Linyuan, or let him kill you." He turned to the last page and saw his own handwriting - "You have gone back seventeen times. How many times is this?"
