Mr. Joskins is selling quack remedies and Dr. Gordon intervenes after they make several of his patients ill. To get revenge Joskins tampers with Beauty's girth strap which injures Kevin while he is riding. Albert intially blames saddle maker Surtees but ultimately discovers the true villain.

During a storm Squire Armstrong believes he was attacked by Black Beauty and promises if it happens again, Beauty will be destroyed. Jenny, Kevin, and Ned try to keep the horse contained but Beauty has a equine friend she must get to.