Faced with the decision of a lifetime, Arvilla Holden (Jessica Lange) hijacks her two best friends (Kathy Bates, Joan Allen) and sets off in a vintage "66 Bonneville convertible across the great American West to deliver her husband’s ashes to her step-daughter. What begins as a simple trip, will end up becoming a chance to rediscover themselves, their friendship, the importance of promises - and of living life to the fullest.