Supervillain Megamind and his arch-nemesis, the superhero Metro Man, are both aliens who were sent to Earth as infants before their planets were sucked into a black hole. Though both land in Metro City at the same time, Metro Man is raised in a mansion, while Megamind is raised in a prison. He goes to the same school as Metro Man, who is well-liked by his classmates. Megamind is bullied by everyone until he concludes his purpose is to be a supervillain, setting off a rivalry between him and Metro Man. As an adult, Megamind, aided by his fish-like companion Minion, frequently and unsuccessfully battles Metro Man for control of the city.