Ultron, the homicidal artificial intelligence so long devoted to ending life on Earth, has found a new world to conquer. Thanos's brother Starfox must seek the aid of his former allies, but the Avengers he finds are radically different from the ones he once knew. Among them is Ultron's creator. When Hank Pym confronts his now planet-sized son, the responsibilities of fatherhood have never loomed so large.