The plot is unknown.
Tony Stark (Robert Downey Jr) jump-starts a dormant peacekeeping program called Ultron, but it goes rogue and things go terribly awry. With the fate of Earth hanging in the balance, The Avengers are forced to reassemble and they encounter two mysterious and powerful twins, Pietro (Aaron Taylor-Johnson) and Wanda Maximoff (Elizabeth Olsen).
Thor’s (Chris Hemsworth) evil brother, Loki (Tom Hiddleston), gains access to the unlimited power of the Tesseract and uses it to unleash an alien race. Nick Fury (Samuel L. Jackson) initiates a superhero recruitment effort to form The Avengers and defeat the unprecedented threat to Earth.