In Iron Man 3 Tony Stark (Robert Downey Jr.) has to deal with posttraumatic stress disorder after the events of The Avengers. Meanwhile a mysterious terrorist only known as the Mandarin (Ben Kingsley) starts bomb attacks which can’t be traced back to him. On top of that Aldrich Killian (Guy Pearce) appears with a strange new DNA-changing virus known as Extremis and has some unfinished business with Tony.