This is the only first AVENGERS movie in which AVENGERS don't fight with aliens because the main villain of this movie is artificial robot if I tell from my heart, AVENGERS AGE OF ULTRON is my last favorite movie in the AVENGERS franchise .The story of this movie starts like IRON MAN 3 in which IRONMAN/TONY STRAK wants to save the world from the alien war, so he prepares an artificial intelligence software with the help of bruce banner ( HULK) and the story progresses When that artificial robot named ULTRON Runs out of IRONMAN and Bruce Banner's control. And then IRONMAN , THOR , CAPTAIN AMERICA , HULK , BLACK WIDOW , HAWKEYE fights the Avengers Assemble.