Captain Marvel and the Avengers face the enemy within! When vicious echoes from the past of Earth's Mightiest Heroes crop up all over Manhattan, Carol Danvers refuses to be grounded by her recent and mysterious loss of power. But who is the sinister figure behind the madness, and what does it have to do with Carol's calamitous condition? And the most disturbing question of all...is this villain even real? Things get worse as the events of Infinity unfold. Carol goes cosmic - Binary cosmic - in an epic that rocks worlds, not least hers! But when she comes back to Earth with a bump, will her biggest fan be the key to rebuilding her life? You just can't keep a good Captain down! COLLECTING: Captain Marvel (2012) #13-17, Avengers: The Enemy Within #1, Avengers Assemble #16-19, Avenging Spider-Man #9-10.