Iron Man 3 is a superhero film of Hollywood. The movie is about Tony Stark whose world is torn apart by a terrible terrorist called the Mandarin. He starts a journey of transformation and retribution.
Tony Stark recalls a New Year’s Eve party in 1999 with researcher Maya Hansen, creator of Extremis-an investigational regenerative treatment intended to allow recovery from crippling wounds. Disabled researcher Aldrich Killian offers them a place in his enterprise, Advanced Idea Mechanics, but Stark rejects the offer, embarrassing Killian.
Years later, Stark’s experiences during the alien attack of New York are providing him panic attacks. Restless, he has constructed several dozen Iron Man suits. A string of bombings by terrorist the Mandarin has left intelligence agencies confused by a lack of forensic evidence. When Stark Manufacturing security topmost Happy Hogan is seriously injured in one such violence, Stark overcomes his stupor and issues a television threat to the Mandarin, who replies by destroying Stark’s home with helicopter gunships.
Stark escapes in an Iron Man outfit, which his artificial intelligence JARVIS guides to rural Tennessee. Stark’s experimental armor lacks enough power to return to California, and the world believes him departed.
Teaming with Harley, an intelligent 10-year-old boy, Stark scrutinizes the remains of a local blast bearing the marks of a Mandarin attack. He determines the “bombings” were activated by soldiers subjected to Extremis. The violent part of Extremis is that if the body stops receiving the drug it explodes itself. To hide this damaging effect of the drugs, terrorist attacks are used as a cover.
With Harley’s assistance, Stark traces the Mandarin to Miami and penetrates his headquarters using improvised weapons. Inside he learns the Mandarin is a British actor named Trevor Slattery, who claims he is unaware to the actions carried out in his name. The Mandarin is a formation of Killian, who adopted Hansen’s Extremis investigation as a cure for his own incapacity and extended the program to include injured war veterans.
Killian captures Stark and murders Hansen when she has a change of heart about the plan.
Stark escapes and reunifies with Rhodes (the former War Machine, now re-branded as the Iron Patriot), learning that Killian expects to attack President Ellis aboard Air Force One. Stark protects some remaining passengers and crew but cannot stop Killian from kidnapping Ellis and abolishing Air Force One.
They trace Killian to a stored damaged oil tanker where Killian means to kill Ellis on live television. The vice president will become a dummy leader.
Rhodes saves the president. Stark discovers Potts has continued the Extremis process. However, before he can protect her, a rig collapses nearby them, and she falls to her death. Stark challenges Killian and tricks him in an Iron-Man suit that self-destructs, but fails to murder him. Killian then discloses he is the real Mandarin. Potts, whose Extremis powers permitted her to survive her fall, interferes and kills Killian.
After the fight, Stark orders JARVIS to abolish each Iron-Man suit as a sign of his dedication to Potts. With Stark’s help, Potts’ Extremis effects are alleviated, and Stark undergoes surgery to eliminate the shrapnel embedded near his heart. He pitches his outdated chest arc reactor into the sea, thinking that he will always be Iron Man.
In a current day post-credits scene, Stark wakes up Dr. Bruce Banner, who fell sleeping listening at the beginning of Stark’s story.