体热边缘Straight-laced, type-A personality Joy Miles has to take an unscheduled road trip to drive her forgetful, yet opinionated, mother-in-law, Loraine, from Louisville, Kentucky to Savannah, Georgia. Although initially impatient and frustrated, Joy begins to realize her true affection for Loraine as she takes a front-seat-view of how this strong-willed yet free-spirited woman manages the emotional transition of learning to live life after losing her spouse. Despite their many differences, and with light-hearted adventures at every turn, they discover how much they respect and even need each other.