Lin Guodong, a 48-year-old shopping mall security guard, was suddenly bound to a mysterious "community patron saint" system on a desperate night when he was laid off and had family discord, and was trapped on the same day. The system tasks are all kinds of strange: preventing the programmer owner from jumping off the building, helping his mother who failed to start a business to see through fraud, saving the teacher who suffered a heart attack... He must accumulate experience and skills through countless "file readings" in an infinite loop, transforming from a useless middle-aged man who is overwhelmed by life, into an "invisible hero" who truly protects the community. When all the tasks pointed to the ultimate secret of the community's time loop - an old professor's unresolved pain of losing his son, Lin Guodong discovered that what he wanted to save was not only the day of his neighbors, but also his own life that had long been numb. This is a story about ordinary little people finding courage, connecting with warmth, and ultimately saving themselves in the cycle.
