Issie and her friends are on track for a good finish at the Interclub Gold Shield pony-club competition until someone sabotages their equipment, and they call on Mystic to help uncover the truth.
The Core Four--Avery, Bree, Esha, and Jaelyn, campers at Storm Cliff Stables--discover that someone has been cutting down trees on Aunt Jane's property just as an old friend and neighbor of hers is pushing to buy a piece of her land.
When substitute middle-school history teacher Rush Revere takes his students back in time to eighteenth-century Massachusetts, they witness the Battle of Lexington and learn about the Declaration of Independence.