Ever since a developer offered Tess Sherrill's Uncle Matthew a lot of money to buy his property and stables and Matthew turned him down, somebody has been out to sabotage him. Is it the developer, who can't build his mall and houses? The neighbor whose deal will fall through if Matthew won't sell? The owner of the stable next door who has a family grudge against the Sherrills and stands to gain business at her own place if Matthew loses his boarders? One thing's for sure - if Tess and her friends don't act fast to find out who it is, all horses including Tess's beloved Palomino, Ariel, are in danger!