Lin Mo, who has functional speech sound disorder, dreams of becoming a documentary narrator. But he is suddenly hit by two devastating blows: his mother is diagnosed with early-stage stomach cancer, and his best friend runs off with both the money for her life-saving treatment and his startup funds. Desperate to raise the surgical fees, he posts documentary videos despite his imperfect pronunciation and the ridicule he faces. Fortunately, Chen Xi, a speech therapist, offers to help him correct his pronunciation for free. Lin Mo persists in telling heartwarming stories about ordinary people in the city, and his videos unexpectedly go viral, allowing him to raise enough money for his mother's surgery. In the end, through sincerity and hard work, Lin Mo wins the city's narration competition. He reunites with his best friend to relaunch the program City Glimmers, gathering little sparks of light into warmth and illuminating the lives of more ordinary people.