A summer full of horses, adventure, and unexpected twists—that is what pony camp promises to be. But for Nikki and Vivianne, who, as stepsisters, can barely stand each other's presence, it looks like a disaster. A week full of horses, strange girls, and forced teamwork? That can't end well! Yet, they find themselves in situations where they have no choice: cooperate or fail. Can they put their dislike for each other aside? Meanwhile, friends Jolien, Sarah, and Britt are looking forward to a fantastic week full of trail rides and fun. But one ride through the woods changes everything. An unexpected event puts their friendship under pressure; can they still trust each other? As if that weren't enough, the ghost hunt brings ominous mysteries with it. Nikki and Vivianne are assigned to girls who hate them, and as they enter the dark forest, strange things begin to happen. Hoofbeats without a horse, a shadow in the mist. Is this a scary camp prank, or does the ghost horse really exist?