follows Barbie "Brooklyn" Roberts and Barbie "Malibu" Roberts as they embark on a new adventure vacation of a lifetime: a trip to the English countryside to visit Lady Carson, Ken's aunt and owner of cherished horses Tornado and Pepper. Before Barbie and Barbie can take in the sights, their plans are immediately derailed by the brazen theft of the prized jumping horses and a diamond-encrusted saddle worth millions of dollars. Suddenly, everyone is a suspect. To clear their names and rescue the beloved horses, Barbie and Barbie embark on a journey across Europe, chasing clues and suspects to reclaim what was stolen and save the day.