The secrets of G.I. Joe and Cobra's pasts are revealed as the greatest arms race in history intensifies, blazing a path across the world. Desperate for an equalizer, the Joes raid a top-secret Cobra bunker located in the Everglades. But when Cobra's newly hired Dreadnok biker gang intervenes, will the Joes be too late to gain the advantage and, more importantly, save their Autobot allies?!