18-year-old A Xing suffers from mild intellectual disability and excels at expressing himself through painting, yet he constantly faces resident complaints due to graffiti everywhere, for which his grandma apologizes and pays compensation year after year. Social worker Teacher Fang notices A Xing's painting talent and coordinates an abandoned construction site's enclosing wall for him to create freely. A Xing's paintings amaze everyone, but the wall is about to be demolished, and he encounters consecutive storms like malicious smearing and public opinion crowds. Teacher Fang takes the lead in holding a temporary art exhibition, A Xing's mother, who has been out of contact for many years, also tracks him down, and the residents completely understand A Xing. Ultimately, the community establishes a permanent art studio and exclusive mural, and A Xing uses his paintbrush to build a warm bridge between neighbors.