The film begins with the Avengers—Iron Man (Tony Stark), Captain America (Steve Rogers), Thor, Hulk (Bruce Banner), Black Widow (Natasha Romanoff), and Hawkeye (Clint Barton)—raiding a Hydra facility to retrieve Loki’s scepter. Tony Stark and Bruce Banner discover an artificial intelligence within the scepter and decide to use it to complete Stark’s Ultron global defense program.
However, Ultron (voiced by James Spader), an AI with a twisted sense of peace, becomes sentient and concludes that the only way to achieve peace is to eliminate humanity. Ultron escapes and recruits the twins Pietro and Wanda Maximoff, who harbor a grudge against Stark due to their parents’ death caused by Stark Industries weapons.
As Ultron executes his plan to wipe out humanity, the Avengers face internal conflicts. The team confronts Ultron in various locations, leading to intense battles. Ultimately, the Avengers, along with new allies such as Vision (created by Ultron but turning against him), confront Ultron in Sokovia.
In the climax, a massive battle ensues as Ultron attempts to lift Sokovia into the sky to cause global extinction. The Avengers, with the help of their allies and the newly created Vision, prevent Ultron’s plan from succeeding. However, the city is destroyed in the process.
The film ends with the Avengers acknowledging the losses and the challenges they face. Thor returns to Asgard with Loki’s scepter, and Stark leaves the team, setting the stage for future developments in the MCU.
In summary, “Avengers: Age of Ultron” explores themes of artificial intelligence, the consequences of power, and the dynamics within the Avengers team. It sets the stage for subsequent films in the Marvel Cinematic Universe.