Focusing on a British couple, Liv and Will, they seem to have it all: a rock-solid marriage, a glamorous new life in New York thousands of miles away from home. They are still young and feel they have their life ahead of them, until Liv discovers Will's affair. Heartbreak is quickly followed by another emotion: anger, and revenge is her only option. When Will proposes a tour around America's epic national parks to give their relationship a fresh start, Liv knows her chance has come, and a dream vacation and what should have been a happily ever after quickly turns into a nightmare reality.