Tony Stark is Iron Man - technological visionary, wealthy playboy, unparalleled engineer and armored Avenger. But NOW!, his greatest invention has just become his greatest mistake: The lethal techno-virus Extremis is out in the wild! Tony's hunt for the rogue Extremis Units takes him to New Camelot, where he clashes with the mech-knights called the Circle and dogfights the Russian Black Exoskeleton Academy; to Colombia, where he battles old foes Vibro, Firebrand and the Living Laser; and to the ancient catacombs of Paris, where absolute horror awaits - and Tony may have to betray an old friend! Introducing Iron Man's stealth armor, heavy-duty battle-suit and space armor as Tony creates new suits to tackle new challenges! If he wants to save the world from his own deadly nano-virus, Iron Man must act fast - and Tony Stark must build faster! Collecting IRON MAN (2012) #1-5.