Stark Arms is the largest arms supplier to the U.S. military in the world. Its new head, Tony Stark (Robert Downey Jr.) He is handsome and talented. He worked closely with company veteran Obadia Stein (Jeff Bridges) to push Stark's business to the top. In real life, Tony is keen on collecting expensive sports cars and doing some inventions and creations. Of course, a casual marriage is even more indispensable. Fortunately, he has good assistants like Virginia Potts (Gwyneth Paltrow) around him to take care of everything, allowing him to live the life of a noble son freely. On their way to the Middle East to display new weapons for the military, Tony and his group were attacked by terrorists. He was hit by shrapnel and almost died. With the help of Dr. Insen, Tony transplanted a nuclear-powered artificial heart into his body. The terrorists asked Tony to make powerful weapons of destruction. He and Insen made a feint and secretly created a set of steel armor driven by fusion energy. Put on armor, Tony made a fuss about the terrorist base and returned to the United States...