Barbie, and her sisters set off to the Alps for a riding tournament at their Aunt's Academy, but when Skipper finds out the Academy is due to be sold they set out to win. Barbie is distracted by the myth of an ancient species of horses.

Barbie and her sisters, Skipper, Stacie and Chelsea, and their adorable new puppy friends find unexpected mystery and adventure when they return to their hometown of Willows. While going through mementos in Grandma's attic, the sisters discover an old map, believed to lead to a long-lost treasure buried somewhere in the town. With their puppy pals in tow, the four girls go on an exciting treasure hunt, along the way discovering that the greatest treasure of all is the love and laughter they share as sisters!

Barbie and her sisters go to an island paradise for a dance competition, but they must work together as a team to find their pets after their furry friends go missing at a horse festival.