Sarah and her older cousin Julie take a trip to the forest where they stay in a small cabin. They set about to explore their surroundings. Sarah is awed by the towering forest and, later that night, dreams of flying over the treetops like a bird. Julie, meanwhile, takes a darker view and feels nervous and uneasy and tries to block out her fears by having a wall built around the cabin. Sarah helps her cousin battle the monsters that emerge from behind...