An Avengers squad of Iron Man, Hawkeye, Scarlet Witch, and Black Panther travels to Canada, where they rescue She-Hulk from the clutches of the Headmen. After turning over the villains to the Canadian government, the team steers the Quinjet towards home, but is ambushed somewhere over upstate New York. A teenaged girl stands in the sky, directly in the Quinjet’s flight path, and then passes through the speeding craft like a ghost, disrupting all of the Quinjet’s flight systems.
The Avengers make an emergency landing in a wooded area, where they are confronted by Cyclops, Wolverine, Colossus, Nightcrawler, and Shadowcat – The X-Men. Cyclops demands that the Avengers immediately turn over the Scarlet Witch to their custody. When Iron Man refers, the two teams clash. After a vicious battle, the Avengers find themselves defeated, and when they regain consciousness, the X-Men are gone – And so is the Scarlet Witch.