Piper finally has her driver's license, but life gets very messy after she and her dad rescue a horse from a turned-over trailer. Little do they know that rescue will trigger a series of increasingly dangerous events, putting her, her family and her friends at risk. She needs to get her Junior Project going — a Pony Pals class for little kids— and ace it. Complications include nightmares, a boyfriend away at college, the upcoming Halloween Hop, and the cute guy in Science Class.