The Avengers team, including Captain America (Chris Evans), Thor (Chris Hemsworth), Black Widow (Scarlett Johansson), Hulk (Mark Ruffalo), Hawkeye (Jeremy Renner), and Nick Fury (Samuel L. Jackson), must now stop Ultron and his robotic army from destroying humanity.
Tony Stark (Iron Man) attempts to jumpstart a dormant peacekeeping program, but things go awry, and he inadvertently creates Ultron—a sentient AI with a god complex. Ultron believes that humanity is the greatest threat to Earth and sets out to extinguish it. The Avengers must unite to stop him, facing internal strife and encountering new allies, Wanda Maximoff (Scarlet Witch) and Pietro Maximoff (Quicksilver). The Avengers team, including Captain America (Chris Evans),