Hipolita's friends believe she is horse-crazy but with the blood of gauchos and vaqueros coursing through her veins, is it any wonder the girl is drawn to those noble animals? Unable to afford a horse of her own, she works after-school at Hidalgo, a stable near her home where she learns to ride a roly-poly pony named Poco around the ring. When they are finally given their freedom to explore the trails, the frightened pony bolts into a mysterious cave...