Overview
In 1999, Tony Stark meets scientist Maya Hansen, creator of a groundbreaking regenerative treatment called Extremis, but declines an offer from disabled scientist Aldrich Killian to join Advanced Idea Mechanics.
Fast forward thirteen years, Stark battles PTSD and panic attacks due to the New York alien invasion. He builds many Iron Man suits, straining his relationship with Pepper Potts. The Mandarin orchestrates bombings, injuring Stark's security chief, Happy Hogan. Stark unwittingly reveals his address, prompting a retaliatory attack on his home. Stark escapes, leaving the world to think he's dead.
With a local boy's help, Stark investigates Mandarin's bombings. He discovers Extremis is behind the explosions, not the Mandarin. Stark encounters Extremis agents and saves Potts from Killian's clutches. Killian betrays Hansen and fatally shoots her.
Stark reunites with Rhodes and thwarts Killian's plan to attack the President on Air Force One. However, Killian abducts the President and plans a public execution on an oil tanker.
The only way for our Hero to take the win, is to sacrifice what's important to him.