Jane is the main character in the book. Her grandmother buys a pony that she had sold years ago and gives it to Jane for her birthday. The horse is named Popcorn and he's trouble. Jane has to send him to a camp to get trained so that she can ride him. Meanwhile Jane takes riding lessons to become a better rider. The horse learns to take commands and Jane learns to give them well. The are together again and even win a ribbon in a horse show.