Mysterious underwater earthquakes are occurring, so the Avengers head to the sea kingdom of Atlantis to talk to its ruler Namor.

When satellites are blasted out of their orbits, the whole world is threatened. The Avengers recruit Tony Stark into their ranks to assist them.

Vision volunteers to be "bait" to allow himself to be captured by Ultron as a way for the Avengers to track him to the villain's lair. But he finds himself torn between two loyalties.