Tony Stark (Robert Downey Jr.) is a billionaire industrialist whose forte is building weapons of mass destruction. When he’s severely injured while testing one of those weapons in Afghanistan, he’s kidnapped by insurgents and has to build a suit of iron armor to escape his captors. After returning to the U.S., Stark refines his iron creation and transforms himself into a flying metallic repulsor-ray-firing superhero. When his biggest business rival, Obadiah Stane (Jeff Bridges), gets his hands on Stark’s original plans, he creates an even bigger iron adversary to defeat Stark once and for all.