Barbie and her sisters discover everything's better when you do it together in this splashy, sun-kissed adventure. After the girls and their pets arrive at an island paradise for Chelsea's big dance competition, they decide to make a quick side trip to see the nearby Dancing Horse Festival. But when their furry friends go missing at the event, it's up to the sisters to find them before Chelsea's show. While the puppies are out having an adventure of their own, the girls must use their imagination and work together to find their furry friends in this tail-wagging good time.

Barbie and her sisters, Skipper, Stacie and Chelsea, and their adorable new puppy friends fnd 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!