Easy-to-read, rhyming text follows Lacy and her pony, Jack, as they compete in a horse show.

Hoping to become the intermediate team's top-ranked rider, Lauren confronts unexpected competition from a talented foreign exchange student who rapidly makes friends with her dazzling smile and eagerness to demonstrate fancy skills.

When competition for lucrative prizes ranging from money to placement on the Olympic Team escalates to the point where one desperate participant drugs horses at the River Heights Horse Show, Nancy, Bess, and George track clues to identify the culprit.