In the shadow of the bustling city, there is a mysterious organization called the "Reality Stability Bureau". They are responsible for maintaining every rule of the world's operation and correcting occasional "BUGs". On his first day at work, newcomer Chen Mo turns an innocent homeless man, Zhou, into a "gap man" due to an operational error - a being with a very low sense of existence who can fit into any narrow gap. From then on, Lao Zhou wandered among the cracks in the city and glimpsed countless buried secrets, while Chen Mo was involved in a crisis related to life and death. When the Stability Bureau decides to "delete" this BUG, Chen Mo must find Lao Zhou and unravel a conspiracy to subvert the rules before his memory is wiped.
