Mandy and James are sad that their friend Wilfred Bennett has to sell his riding stables. Things get even worse when Sam Western turns the land into a campsite and wants everyone to forget that the stables ever existed. Now campers are telling stories of a ghostly horse and rider passing through the campsite - and vanishing into the night air! Mandy and James don't believe the spooky tales, but can they figure out what's really going on?