The narrative unfolds in verse, detailing the experiences of Gerald McCloy, who communicates not through speech but through various sounds—a train whistle, a car horn, among other things. Medical professionals are unable to assist him, causing considerable distress for his parents. Due to his communication challenges, he’s kept out of school, leading to isolation and ultimately earning him a descriptive nickname as he becomes an unhappy young boy. He leaves home and encounters the owner of a radio station, who discovers Gerald's talent for mimicking sounds, quickly establishing him as something of a sensation. The animation is simple in design but benefits from a brisk pace and upbeat music; the story carries a heartwarming message. Ultimately, things turn out well for him.

Source on TMDB