The most deadly weapon in history-a green mist which turned all it touched to flaming ruin-was ravaging America! Far off in Etoria, war-dog kingdom of the Mediterranean, a power-mad demagogue plotted the conquest of the world, and subjugating our land was his first wily move...! While the United States Government prepares to surrender humbly-while war scars a thousand-mile front in Europe-Operator 5, Ace of the American Intelligence, alone, disgraced, challenges the might of the new Napoleon and single-handedly carries the battle into the powerful warlord's own fortified palace!