"Marvel Studios’ “Iron Man 3″ pits brash-but-brilliant industrialist Tony Stark/Iron Man against an enemy whose reach knows no bounds. When Stark finds his personal world destroyed at his enemy’s hands, he embarks on a harrowing quest to find those responsible. This journey, at every turn, will test his mettle. With his back against the wall, Stark is left to survive by his own devices, relying on his ingenuity and instincts to protect those closest to him. As he fights his way back, Stark discovers the answer to the question that has secretly haunted him: does the man make the suit or does the suit make the man?"
Back at the 1999/2000 new years celebration, Tony Stark met Maya Hansen at Switzerland. Maya told Tony about the Extremis project. In the present day, Tony Stark never felt the same since the battle of New York. Tony has to encounter a terrorist known as the Mandarin. The Mandarin sent propaganda to the U.S. president. When Tony's house was destroyed by the Mandarin, Jarvis took him to Tennessee where another attack was commited. Tony met a young boy named Harley. The attacks were revealed from kamikaze Extremis wielders. Harley helped Tony track the Mandarin which is revealed as Miami. Inside the Mandarin's house, the Mandarin was actually an actor named Trevor Slattery. The Mandarin was an invention of Aldrich Killian.
Tony Stark is talking to Bruce Banner. Bruce Banner wakes up from his sleep. Tony used Bruce as a therapist. Bruce slept since Tony told him about the New Years party.