Isobel Lund has moved to The Island with her family after having won the County Show that summer. Izzy and Pin are closer than ever and her bond with Pegasus is stronger than before. Pin makes a decision that threatens to tear Pun and Izzy apart as new rivals show themselves. Zoe is determined to keep Raven as Izzy and Pin always find themselves to be so close yet so far. With these new challenges, can Izzy and Pin find the strength to stay together? Or will they fall apart? And what of the wild herd of horses that have shown themselves? It's up to Izzy and her friends to save the wild herd before it's too late.