A new zombie virus is unleashed on the Marvel Universe - and Groot is patient zero! Groot feels bad - not only because Rocket's latest scheme put them firmly in the crosshairs of the Avengers, but also because he's just plain sick! Sap-dripping nose and all. Things go from bad to apocalyptic, however, after an ill-timed sneeze in Captain America's face has unforeseeable consequences! Suddenly, a horde of zombified Avengers attacks Groot - and only he and Hulk, with his impenetrable green skin, remain impervious. Now it's up to these two heroes to team up and fight their way through a blighted New York City to Banner's lab in Avengers Tower to find a cure before it's too late. But can Groot keep the hero in check and on track, or will Hulk unleash his deadly might on the zombies they once called friends?
