After the advent of the world tide, the most dangerous thing in the city has never been monsters, but the mistakes that suddenly arise: a door that does not exist, a car that is mistaken, and a bell that rings in advance. Lin Xu, a temporary worker in the warehouse, can see the white lines that are about to break between things, but he has no way of knowing what will happen after the break. An accident at Gate 3 involved him in a boundary investigation, and he also discovered that certain disasters were not natural - someone was writing mistakes into reality. In order to survive, and to protect the people around him, Lin Xu must find the relationship that was quietly rewritten before the rules are completely closed. But when all the clues pointed to the same answer, he realized that it might not have been the door that was really marked, but himself.
