Unisex t-shirt. Mortal Engines is an upcoming post-apocalyptic adventure film, Millennia after much of the world was destroyed in a cataclysmic event, civilization has adapted a new way of living. Gigantic moving cities now roam the Earth, chasing and devouring smaller traction towns for resources. Tom Natsworthy (Robert Sheehan), a low-class citizen of the moving city of London, finds himself fighting for survival after he encounters the fugitive Hester Shaw (Hera Hilmar). Opposites stuck together, they must forge an unlikely alliance that could change the future.