It's fifty years after humans were almost destroyed by an alien, insect-like race called the Formics. Their mothership was destroyed by a human pilot who ran his ship into the spacecraft. Now, the International Military is preparing for a second encounter and are preparing new soldiers to fight the battle. They are all children, because their reflexes are quicker. Ender Wiggin, a young boy, is at the top of the list. His two siblings flunked out of the Academy, one for being too passive, the other for being too aggressive.
Not a terrible movie, just a lackluster adaptation of the book--but I think the novel is an impossible thing to adapt well. This movie comes off like a version of STARSHIP TROOPERS with kids.