Kathleen is eighty years old. After a run-in with an intruder, her daughter wants her to move into a residential home. She's not having any of it. What she craves - needs - is adventure.

Liza is drowning under the daily stress of family life. The last thing she needs is her mother jetting off on a wild holiday, making Liza dream of a solo break of her own.

Martha is having a quarter-life crisis. Unemployed, unloved and uninspired, she just can't get her life together. But she knows something has to change.

When Martha sees Kathleen's advert for a driver and companion to take an epic road trip across America, she decides this job might be the answer to her prayers. Travelling with a stranger? No problem. She's not the world's best driver, but it couldn't be worse than living with her parents again. And anyway, how much trouble can one eighty-year-old woman be?

As these women embark on the journey of a lifetime, they all discover it's never too late for adventure...