A 40,000-year-old race of snake people resurface and, with the help of Serpentor, Destro, Baroness, and Dr. Mindbender, plan to eliminate all of mankind and rebuild Cobrala. Once rulers of Earth, the Snake people were driven underground by ice-age temperatures.

While in exile, they developed a plant whose spores turn ordinary men into mindless, weak animals. G.I. Joe's secret project--the Broadcast Energy Emitter--is the key to their evil plan. Only this device generates enough heat so that the spores can mature.

Humankind's very existence depends on G.I. Joe, but are they strong enough, smart enough, and cunning enough to fight a warrior race with 40,000 years of experience?

Features the voices of Don Johnson, Burgess Meredith, Sgt. Slaughter, and others.