School is out and Cristal is packing up for a three-week-long jumping camp. She's having fun with the other kids there, and the horses and ponies there are nice, but she misses Skye, her Andalusian. Then something strange happens--tack changes places overnight, halters are missing, and horses switch stalls while everyone is sleeping. After something very important goes missing, it's up to Cristal and her friends to find the culprit.