Maltazard, the Evil M, is now 7 feet tall and evolving among the humans, causing terror wherever he goes. His goal is simple: forming an army of giant henchmen and ruling over the universe. Meanwhile, Arthur is still a Minimoy, and thus in a state where he's unable to fend him off. With the help of Selenia and Betameche, he hatches a plan to regain his usual size: all they must do is infiltrate Arthur's house through the pipeworks, catch an electric train from his bedroom to his grandfather's study and find an elixir that will make him grow back to his human size. Sounds simple enough, if it weren't for Darkos, Maltazard's own son, hot on their tails.
Jean-Claude is a loud-mouthed, know-it-all and full time boor who is best friends with Stef, a self-styled lady killer who would do better with the fairer sex if he could work up the ambition to wake up in the morning. Stef has decided that he may need some help in finding the woman of his dreams, and embracing loyalty rather than logic he turns to Jean-Claude for advice.
Ten-year-old Arthur, in a bid to save his grandfather's house from being demolished, goes looking for some much-fabled hidden treasure in the land of the Minimoys, a tiny people living in harmony with nature.
Cast: Freddie Highmore, Mia Farrow, Madonna, David Bowie, Snoop Dogg
Directed by Luc Besson