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. The key to their plan is G.I. Joe's secret project, the Broadcast Energy Emitter (B.E.T). Humankind's very existence depends on G.I. Joe.