Groot and Bruce Banner are now questioning everything they think they know about the Zombie virus that's taken over the city and their friends. But to be sure, Banner needs to secure a sample from Captain America. Suited up in Hulkbuster armor and flanked by Iron Man's suits, the duo must again face off against the Avengers. Are the heroes - and all of humanity - doomed to a permanent zombie fate? Or will Groot step up and be the hero Captain America believes he can be?
