Jiang Mu is just a courier delivery person. He earns 3,500 yuan a month and can't even pay the rent. His mother was paralyzed in bed, and all her medical expenses depended on him running errands. That day he went to the village in the city to deliver a package and saw his landlord Cui Lihua arguing with someone in the corridor. The person suddenly fell to the ground and died. Jiang Mu's mind buzzed, and a line of words popped up in front of his eyes: You violated the first rule, don't see things you shouldn't see. From then on, he could see the rules in others wherever he went. Some people have more than a dozen hanging on them, while others don't have any at all. The more people hang up, the faster they die. Jiang Mu discovered that in this village in the city, everyone was following some inexplicable rules desperately. And he had seen what he shouldn't have seen.