Synopsis
Tony Stark contacts Henry Pym about the signal he detected from inner space coming from an Avengers ID card. The card must be of a years-old design that doesn't indicate who it belongs to. But both of them think it might be the same person.
Meanwhile the mysterious female sender of the message is still on the run from aliens. She gets captured, but then vanishes from their sight and takes over one of their flying craft. Only to be attacked by other craft.
Iron Man and Giant-Man assemble the rest of the core Avengers team (Captain America, Hawkeye, Red Hulk, Spider-Man, Spider-Woman, Vision and Wolverine) along with Thor (who isn't technically on the team at the moment). They meet in Central Park at the spot where Wasp died at the end of Secret Invasion. Because that is where the signal is coming from. Giant-Man is going to shrink them down into a microverse.
Iron Man says that only he, Cap and Thor will accompany Giant-Man. But just then Wonder Man pops up and offers to go, as part of his attempt to earn back his Avenger status. He points out that his ionic constitution should protect him better than most. But Giant-Man (among others) still doesn't trust him, and so Simon Williams leaves.
Iron Man tells Red Hulk, Vision and Wolverine to stand guard over the 'portal' Giant-Man has set up. Hawkeye, Spider-Man and Spider-Woman should return to Avengers Tower in case something goes badly wrong here.
The 4 heroes shrink to the relevant microworld. All but Thor find their bodies and technology not functioning perfectly, but gradually getting acclimated. They enter the nearby town and find the mystery woman with a big gun. And she really is the Wasp.
Janet van Dyne is dismayed to think that everyone thought she was dead. But before she can explain what really happened in Secret Invasion #8, they are attacked by more flying craft. Wasp tells them she's having a disagreement with the local mafia led by Lord Gouzar, a centaur-like being who has just arrived in his flagship.