After a life-changing experience in captivity, Tony Stark, a brilliant inventor and CEO of a weapons company, creates the Iron Man Suit to escape and vows to use his skills for good. Seeking to contribute to a sustainable future, Stark heads to Japan where he plans to retire as Iron Man and support the development of the revolutionary Arc Station, a fossil fuel-free power source. His retirement announcement is marred by an unexpected assault from Zodiac, a group wielding combat mecha, putting his plans at risk.