Ender's Game synopsis
When hostile aliens called the Formics attack Earth, only the legendary heroics of Mazer Rackham (Ben Kingsley) manage to attain a victory. To prepare for the next attack, Col. Hyrum Graff (Harrison Ford) and his cohorts initiate a military program to find the next Mazer. Recruit Ender Wiggin (Asa Butterfield) exhibits an unusual gift for the training, easily mastering all of the challenges thrown at him. Mazer Rackham, himself, takes Ender as a protege to prepare him for the oncoming war.