70 years after an alien race attacks Earth, the International Fleet prepare for the next invasion by training the best young children to find the candidate who will lead the Fleet and destroy the alien invaders. Ender Wiggin (Asa Butterfield) is this candidate. A shy but strategically brilliant boy, he is recruited by Colonel Graff (Harrison Ford) and enrolled in the legendary Battle School deep in Earth's orbit. However, with the alien hordes rapidly approaching, is Graff's gamble correct and is Ender indeed Earth's last hope?