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.

After being brutally murdered, 14-year-old Susie Salmon watches from heaven over her grief-stricken family -- and her killer. As she observes their daily lives, she must balance her thirst for revenge with her desire for her family to heal.