Bayaraa, a weather-worn muralist who once tasted glory in Europe, returns to Mongolia with only a box of paints, a rooftop tent, and his loyal stray dog. Each day he descends the wall of an abandoned factory, covering its crumbling concrete with sweeping murals of mythic Mongolian landscapes. Watching him is a sardonic balloon, at once conscience, companion, and a stroke of fable. When officials announce the factory will soon be demolished, Bayaraa becomes determined to leave behind his masterpiece. Yet the deeper battle lies within: the long-buried wound of the wife and daughter he abandoned for art.