The Avengers clash with the Guardians of the Galaxy in a desperate search for a planet killer, in this action-packed novel set in the world of the Marvel: Crisis Protocol game. After the destruction of their world, a group of Kree refugees come to Earth to work for Stark Enterprises. But the Guardians of the Galaxy arrive shortly afterwards, believing that the world killer is actually one of those Kree now hiding on Earth. But there are others after the killer, and the Avengers have no choice but to respond - and both Tony Stark and Ms. Marvel must choose between the fate of Earth and the people they care about.