In the not too distant future, alien dragonflies from outer galaxies invaded the earth, killing more than 10 million people. In times of crisis, the brave captain Rackham stopped the invaders from expanding. Using this limited and precious time, the earthlings are committed to finding highly talented teenagers to train and cultivate them, hoping that they can become leaders who can defeat the alien invaders. Ender Wiggin (Asa Butterfield), who is thin, melancholy but has a firm gaze, is one of these teenagers. He is also the object of high hopes and key training for the international fleet. After several rounds of rigorous evaluation, Ender's potential was affirmed by Colonel Graf (Harrison Ford), the commander of the battle school. He was taken to the battle school on the orbital space station by the colonel. In a fully closed environment, the future heroes ushered in a new round of training... This film is adapted from the original work of American science fiction writer Orson Scott Card.