In his drive to "build a suit of armor for the world," inventor and Avenger TONY STARK created the IRON LEGION, drones controlled by the ULTRON system. But he did not foresee Ultron turning on his creator, and becoming one of the worst threats the Avengers have faced. Now Tony will need the help of former SHIELD director NICK FURY, as well as an updated suit of IRON MAN armor, to defeat Ultron.