Meet the Beacon Street Girls...They're real, they're fun- they're just like you! It's bad enough that Marty, the Beacon Street Girls' beloved pooch, has gone missing, but somehow the "little dude's" disappearance is creating tensions among the best friends. Was one of them to blame for Marty slipping out of his collar and running off? But when an opportunity to save High Hopes Riding Stable -- where Katani's bonded with a special horse -- conflicts with the chance to get Marty back from a surprising celebrity, the BSG might not all want the same thing. It's unthinkable -- but could Marty's disappearance break up the BSG?