Rainbows is a story about a special little girl, an abandoned horse and a confused, abused, homeless female jockey surrounded by obstacles they all have to overcome. Casey wears braces on her legs due to a rare illness she contracted at an earlier age. Jenny the jockey has had to deal with a very bad accident the loss of her parents, and the loss of her memory. Rainbows is an intelligent spiritual horse who survived a very bad hoof infection and his neglectful owner who left him for dead.