A daredevil rider almost runs over Sara Jane Karr as she and her brother are navigating a trail on their motorcycles. When a a spree of vehicle thefts and hold-ups in the nearby town of Wickum begins, the town is terrorized by rumors of a red-headed thief. Brother and sister Andy and Sara Jane Karr think there is a link between the thefts and the rider from the trail. They spring into action. The stakes rise when a fortune worth almost a million dollars vanishes from the mysterious Applegate Mansion, and their classmate's father stands accused. Following cryptic clues and dangerous leads into the forgotten and abandoned trails in the Pocono Mountains, the Karr siblings must clear an innocent man's name and unmask the real criminal before it's too late.