plot_synopsis: Genius, billionaire, and playboy Tony Stark, who has inherited the defense contractor Stark Industries from his father, is in war-torn Afghanistan, with his friend and military liaison Lieutenant Colonel James Rhodes, to demonstrate the new "Jericho" missile. After the demonstration, the convoy is ambushed and Stark is critically wounded by one of his own company's rocket-propelled grenades. He is captured and imprisoned in a cave by a terrorist group, the Ten Rings; Yinsen, a fellow captive who is a doctor, implants an electromagnet into Stark's chest to keep the shrapnel shards that wounded 
plot_synopsis_sum: Billionaire Tony Stark is captured and imprisoned by a terrorist group. He is implanted with an electromagnet to keep the shrapnel shards that wounded him.