The Extreme team believes Iron Klaw dead and S.K.A.R. defeated. Meanwhile, Rampage moves to assume leadership of S.K.A.R. What neither of them know, is that Iron Klaw is alive and masquerading as Clancy, the G.I. Joe team govt. liaison.
With Iron Klaw still masquerading as Clancy, the Joes must contend with a disgruntled S.K.A.R. recruit, who happens to be a mad bomber. The New York subways are the battleground.
The Joe team believes there is a traitor in their midst, but it's only Lt. Stone that realizes the truth. As S.K.A.R. makes their move, Stone must wage a personal battle for survival in order to save the team and the nation.
The charade is over as Iron Klaw stands revealed, but at what cost to the G.I. Joe Extreme team? Will Lt. Stone stay in his coma, and will suspicions tear the team apart?