Suspicious tongues start to wag when a valuable figurine belonging to Billy Martin comes up missing and fingers point to the newcomer. Although exonerated, Becky feels betrayed, and knowing she'll never really be a team member, she starts to pull away from Karen and the team.
 

Bad girl Emily Goss has a crush on Steve Bianchi, which doesn't sit well with his girlfriend, Becky Edwards, or the rest of the Doubletree riding team.

Known throughout the horse community for her cruelty to her horses and bad sportsmanship, the kids reject her efforts at friendship. Jealous and angry, Emily decides to exact revenge by causing Becky to lose her big class. When the kids figure out how Emily spooked Becky's horse, Jessi Evans returns the trick, causing Emily to slide off her horse. The battle escalates.

An indomitable spirit coupled with a vivid imagination and fierce devotion to her twin make Ella a formidable adversary.

After a particularly vicious beating, it's clearly kill or be killed, so they devise a plan to murder Terry's husband, Bob Wagner. When he demands that Terry accompany him to their remote mountain cabin, Bob gives the girls the perfect setting and opportunity.

Not only is Larry a great rider with a fun, outgoing personality, he's very handsome and it's love at first sight for Melanie Young. Beautiful, smart and popular, it would only make sense for him to reciprocate her feelings, and he wants to, but sometimes wanting and doing are poles apart.

World famous riders and their horses converge on the Thomas and Mack Center to vie for the championship title. As the Trials get under way, the teens are surprised to see Yoli Navarro, a familiar competitor from home, enter the ring. She rides well enough to finish third on opening day and the kids cheer her on, hoping she can continue her winning streak.