One of the greatest secrets in Marvel history is laid bare--and it just may reignite the Civil War between Tony Stark and Steve Rogers! The Illuminati thought their days as the world's protectors were over--until the Hood escaped from prison and embarked on a quest to gather the all-powerful Infinity Gems, which the super-secret brain trust had taken responsibility for safeguarding. Now, Iron Man, Professor X, Mr. Fantastic, the Sub-Mariner, Dr. Strange and Black Bolt will fact a reckoning like never before when Steve Rogers--former Captain America, current commander of the Avengers--learns of their years-long subterfuge. Will even the combined might of the Avengers, New Avengers, Secret Avengers and Illuminati be enough to take down a cosmically powered Hood? And did somebody say "Thanos"? Plus: Spider-Woman has gone missing after discovering a secret from outer space, but her Avengers teammates are hot on her trail. What is the mystery of the Spaceknight?