Tony Star is shocked to awaken and find Spider-Woman, now wanted for refusing to comply with the Registration Act, in his room. She is a herald of grim news... a secret invasion by the remains of the Skrull race, intent on infiltrating our society by replacing key people within powerful organizations... people like Elektra, now revealed as a Skrull.In order to keep a watch on his team, and to insure that he can trust at least one person on it, he has Spider-Woman join his Avengers. But no sooner is the new recruit introduced when a new threat strikes from space.