G.I. JOE has fought Cobra, the Dreadnoks and more, but never before have they faced a threat like this: Gigantic, heaving abominations crawling up from the depths of the Earth itself. As teams of Joes struggle to respond to the unpredictable attacks, Scarlett must decide what to do with the enemy in the team's midst. Plus, the G.I. JOE leader reveals a troubling secret to her second-in-command, Roadblock. Collects issues #5–9.