An army of EVIL brains invade Hero Factory city to turn everyone into evil monsters. But the heroes are stronger than ever and ready to save the city. An army of EVIL brains invade Hero Factory city to turn everyone into evil monsters. But the heroes are stronger than ever and ready to save the city. An army of EVIL brains invade Hero Factory city to turn everyone into evil monsters. But the heroes are stronger than ever and ready to save the city. An army of EVIL brains invade Hero Factory city to turn everyone into evil monsters. But the heroes are stronger than ever and ready to save the city.