A depressed race horse and a lonely boy come together in this touching drama. The horse gets the blues when it loses the dog that was his constant companion. The boy is lonely after his father remarries and sends him to live on his grandfather's ranch. While wandering around one day, the boy and his own dog encounter a rattler and a cougar; they then meet a young girl and the blue racer. Upon seeing the boy's dog, the horse immediately perks up, and the two become friends. This causes the girl to beg the boy to let the dog stay with the horse. At the story's end, the boy finally relents and allows the dog to be with his new friend.