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.