Teenagers Kara and Jessie strike up an unlikely friendship while sitting next to each other on a plane that's bound for the heartland. Forced to spend the holidays in the same small town with relatives that they've never met, the girls devise a plan to switch places for Christmas. Jessie soon finds herself living lavishly with Kara's wealthy grandparents, while Kara starts to bond with Jessie's fun, quirky grandmother and the most genuine, modest family that she's ever known.