Ender Wiggin (Asa Butterfield) is a shy, strategically brilliant boy who has been chosen to leave home and join the elite Military. The International Military only recruit and train the very best young adults to defend Earth from the hostile alien race called the Formics. As Ender excels at Battle School, he attracts the attention of the highly esteemed Colonel Graff (Harrison Ford), who believes Ender to be the military's next great hope. Ender must lead his fellow soldiers into an epic battle that will determine the future of Earth and the human race.