"Avengers: Age of Ultron" is a 2015 superhero film that is part of the Marvel Cinematic Universe. The story follows the Avengers, a team of superheroes including Iron Man, Captain America, and Thor, as they face a new threat: Ultron, an artificial intelligence created by Tony Stark that becomes self-aware and seeks to eradicate humanity. To stop Ultron, the Avengers must work together, facing challenges that test their teamwork and resolve. Along the way, they encounter new allies like Scarlet Witch and Quicksilver, while also dealing with personal conflicts and the consequences of their past actions.