When a fatal equine virus breaks out at a nearby stable, The Saddle Club has to endure forty-five days of waiting and worrying about whether the disease will reach Pine Hollow. Then Carole realises that one of her favourite horses may already be infected, and she decides to take matters into her own hands and hide the horse. Can Carole protect Pine Hollow? Or will she discover that there is nothing she can do to keep her worst nightmare from becoming reality?
Meanwhile, Lisa is trying not to let her competitive urges rule her life. So what if a classmate wants to be valedictorian? So what if graduation is still eight long months away? She doesn't always have to be the best, does she? Will the classroom become Lisa's worst nightmare?
Stevie has found a mysterious place in the woods. Is she on the trail of an Underground Railroad route? Or is she chasing after nothing? And what really happened here - was it a journey to freedom? Or someone's worst nightmare come true?