John Mills, Sylvia Sims, Mark Lester. A 10-year-old boy has been mute since age three. Although his inability to talk is really psychosomatic, he refrains from all human contact and loses himself in a love of nature instead. A kind, retired colonel introduces him to an albino pony and when the colt becomes trapped in a quagmire, the mute boy becomes vocal to call for help. 1969/color/100 min/G/fullscreen.