Folly runs away from home, planning to guide her mother's spirit to the northern tip of New Zealand with her wise pony Tooth, who she can secretly communicate with.

Tooth is my pony, but he’s his own boss. I take care of him and in exchange he lets me ride him. I wasn’t surprised when Tooth first communicated with me. All I knew was that with Tooth, it was different. I loved him the minute I saw him. Of course we understood each other.

Twelve-year-old Folly is angry and grieving for her mum. She isn't ready for Dad's plans for a new life in Auckland with his new girlfriend. So Folly runs away with the one person who truly understands: her wise pony, Tooth. With her mother's ashes in her backpack, Folly sets off to the fabled Cape Reinga, the northernmost point of New Zealand. Through tourist towns and wilderness, across beaches, roads and forest tracks, Folly and Tooth find both adventure and hardship. But then a spur-of-the-moment choice sets danger on their tail. Girl and horse must fight to survive together - to the very end of the road.