Uatu the Watcher, a mysterious being who observes mankind from the Moon, is dead. Nick Fury leads a cosmos-spanning investigation into the murder, forging unlikely alliances and sending Marvel's mightiest heroes to the farthest corners of the universe.

To uncover the truth, Doctor Strange and the Punisher must cross deadly dimensions, the Guardians of the Galaxy, Moon Knight and the Winter Soldier head into deep space, and Emma Frost, Ant-Man and Black Panther journey to the center of the Earth. All the while, Unseen forces gather, and just when the Avengers think they've cornered their murderer, everything explodes—unleashing the Marvel Universe's greatest secrets and rocking the heroes to their core!

In this novelization of the epic storyline by Jason Aaron and Mike Deodato Jr., truths will come tumbling into the light and the original sins of our heroes will be exposed for all to see.