At the Country Club where she teaches horseback riding after school, Mia's heroic rescue of a puppy and horse earns the overwhelming gratitude of their owner, a teen bulldozer named Fiona. But when Fiona's pushy, over-the-top appreciation makes Mia's life a living nightmare, the Friends must Ride To The Rescue!

As the Friends enjoy Heartlake Amusement Park, Emma types a text to Mia, but sends it to Matthew by mistake; a text that could be mega-embarrassing for Emma! As her BFF's, the Friends race to find Matthew's phone and erase the text before he reads it. But first, they must brave space rides, dunking booths and worse: the boys locker room!

It's Stephanie vs. Tanya for Heartlake High Class President. But when Tanya resorts to dirty tricks, Stephanie decides to give her a taste of her own medicine.