Filmmaker Lauren Cardillo and her 80-year-old mother, Irene, take the road trip of their lives, tooling along Route 66 from Chicago to Los Angeles in a Mustang convertible. Shot over the course of three weeks, the chronicle of their journey spans eight states, three time zones, and more than 2,400 miles, spotlighting the fascinating people along the way while capturing the nostalgia of the famous highway.