As the skies of Metro City fill with giant mechs, Astro, a robot with human emotions, arrives in a blaze of glory to defend all that is good. Fueled by jet-powered legs, he buzzes the menacing beasts and blasts them with lethal laser fire from his fingertips. Astro will stop at nothing to protect the humans and robots of his city and as he does, he discovers he is far more powerful than he ever realized.