Carolina Aguasvivas's oldest friend, Vida Jones Castillo, has never been interested in riding horses -- until now! Carolina is thrilled for her BFF to join Paradise Ranch, along with new sponsorship student Brielle Stuart. The barn is a full, happy house!

But the girls' perfect summer falls apart when they find out that one of the horses might be sold -- Carolina's favorite riding buddy, Shadow. Can Carolina and her friends save her beloved horse... and the future of the Unbridled Dreams program?