Samantha's mom springs a big surprise at the start of summer vacation--the two of them are visiting Gram at her new condo in Florida. Samantha can't think of anything more boring than hanging around with a bunch of senior citizens at Sunny Sandy Shores condominium.When Mom gets called back home, Samantha's summer plans take an unexpected turn. Gram and her pal Mimi decide to audition for the Seniors' Got Talent Karaoke Contest. This means taking a road trip across Florida in Gram's new Mustang. What's even worse is that Mimi's grandson, Brandon, is coming with!Nothing about their road trip goes to plan, and Samantha's summer becomes one she will never forget.