An English widow on a reluctant quest. An Australian detective escaping his past. When lives collide, two strangers embark on an epic outback odyssey together.

Many thousands of years in the future, Earth’s cities roam the globe on huge wheels, devouring each other in a struggle for ever diminishing resources. On one of these massive traction cities, the old London, Tom Natsworthy has an unexpected encounter with a mysterious young woman from the wastelands who will change the course of his life forever.