Lin Jian, who delivers food, can see that the city is "sick": the data flow is its pulse, and the collective emotion is its body temperature. When an enemy named "Collector" caused the urban rules to collapse, his mobile phone received a red order from the origin of the system: [Fix core rule loopholes, time limit: tonight. Reward: your existence; price: everything about you.
Tonight, the rules fail. And he is the only fault repairman.