In a post-apocalyptic world where cities consume each other to survive, Hester is the only one who can stop the city of London from devouring everything in its path. It's essentially like if the Hunger Games tributes were individual cities on wheels hunting and eating each other up! To save the world, as strong women protagonists often do, Hester joins up with Tom Natsworthy, a London outcast, and Anna Fang, a dangerous outlaw. You can add this to a long list of movies where grumpy adults try not to get bested by a ragtag group of angsty teens. And, of course, with a name like "Mortal Engines," the film also has really cool steampunk-inspired aspects in its world building and costumes.