In order to keep Stark International from being repurchased by the Starks, an increasingly insane Justin Hammer unleashes Titanium Man on his former henchmen (whom he suspects to be blackmailing him to give up Hammer Multinational) and develops a sinister zombie gas as his latest weapons project.

Obadiah Stane and Iron Monger apparently return to wreak revenge on Tony Stark, but things are not as they seem.