Cobra Commander upgrades the android Overkill, hoping to disrupt the peace conference. Meanwhile, GI JOE questions the loyalty of another of their team; whom once worked for Cobra
It's up to a bickering Ambush and Pathfinder to foil COBRA's latest ransom-demand: $50 billion from the UN, or they'll bombard the globe with a gas which turns ordinary people into blindly-obedient zombies.