The Avengers have been fighting Hydra for months ever since the collapse of S.H.I.E.L.D. Finally finding the base with Loki's scepter, the Avengers steal it, running into mutants Wanda and Pietro who have been working for Hydra. Tony, Bruce, and Peter combine their knowledge of science to use the scepter to create a peacekeeping robot Ultron. Unfortunately, Ultron goes rogue and interprets his mission as destroying society. Wanda and Pietro, who want revenge on Wolverine, who they believe is their father who abandoned them when they were young, team up with Ultron, not understanding that Ultron doesn't want the destruction of just the Avengers, but all of humanity.
