Orphaned Anthea Thornley hopes to finally find a home with her long-lost uncle, but she soon learns not only that he secretly breeds forbidden horses, but that she can communicate with them.

Anthea and her friends are on a mission. Anthea's mother has kidnapped a Coronami princess, the herd stallion, and half a dozen more horses--enough to start her own herd. Suspecting that she is making a deal with the antagonistic emperor of the neighboring land, Kronenhof, Anthea and her friends race there to meet with the emperor and try to find Princess Margaret and the horses. But they don't have much time before Coronam declares war against Kronenhof,...