Tabitha has been volunteering with her best friend Rachael at the Rocky Ridge Riding Center for three months, but she keeps getting in trouble because of her lack of focus--can working with the troubled horse, Diamond, help her to save both of them for the Riding Center?

Nine-year-old Tori is thrilled to be spending the summer at her grandmother's ranch, even if she has to share a room with her younger sister Miranda, who is eight--there is a beautiful, but very nervous, new pony called Jewel that she would love to ride, but her grandmother feels that this pony is just too much for a child.