The Joes travel to the arctic to retrieve rare minerals to fuel their MASS device, but Cobra ambushes them, and Snake Eyes is presumed dead. Duke manages to escape the Cobra base with the help of a slave girl, but he is injured and cannot remember the base's location.

As Flint, Mutt, and Shipwreck return to Joe Headquarters, the Joes and Cobras head to the Island of No Return and the jungle Palace of Doom to retrieve parts of the weather dominator.

As G.I. Joe and Cobra race to retrieve the three parts, Zartan ensures that each side acquires one piece, and then steals the laser core at the Roof of the World.