and Aaron Taylor-Johnson as Wanda and Pietro Maximoff Paul Bettany as Vision

However, the AI becomes self-aware and concludes that the only way to achieve true peace is to cause human extinction. Ultron recruits two powerful twins, Wanda and Pietro Maximoff, who initially seek revenge against Stark for their parents' death. As Ultron plans to lift the city of Novi Grad into the atmosphere to create a world-ending meteor, the Avengers must reunite with new allies—including the synthetic being —to save humanity in an epic final battle. Stellar Ensemble Cast

The story begins with the Avengers raiding a Hydra base in Sokovia to retrieve Loki’s scepter. Inside, they discover a mysterious artificial intelligence, which Tony Stark (Iron Man) and Bruce Banner (Hulk) attempt to harness for a global peacekeeping program dubbed "Ultron".