Hope is busy helping her best friend Katie's family operate Granny's bar, the Library, when who should place a surprise call to the bar's main line but Granny herself. It appears her and Bess's vacation to an idyllic oceanside Mexican resort has been, let's just say, eventful.

Eventful enough for Granny to make the emergency phone call back home to do something she never ever does. Ask someone else for help.

Now it's up to Hope and Katie to leave behind life in Hopeless for their own Mexican Beach Vacation in order to complete a very important mission.

And if they don't succeed, there's a very good chance that Granny and Bess are never coming home.