From coast to coast, from border to border, the United States of America is enmeshed in the most gigantic political conspiracy the world has ever known. Insane dictator Ursus Young has set up a despotic kingdom, destroyed the law, and drained the nation dry of its financial resources. Blindly and malignantly he is hurling it to a ruin from which it may never emerge. Against his ruthless, deadly power, there is only Operator 5, America's Secret Service ace, and his few faithful followers....
Like the tentacles of a gigantic and loathsome octopus, the ends of that infamous international espionage ring had stretched out across the United States. Lusting for power, the fiendish leader of that ring was stripping the country of its entire armaments; butchering, in the very capital of the nation, the patriots who pleaded for adequate war-strength.
Gold - a nation's strength for war and peace - had been completely looted from the Treasury in Washington by an octopus-like international syndicate. A mysterious madman - more cunning even than death - captained the ruthless spy crew that was sucking the lifeblood from our land. The proudest nation in the world seemed helpless - doomed! One man alone, Operator 5 of the American Intelligence, grasped the full import of that crafty plunder-plan.
Oil. Black gold. The blood of Mother Earth! America had squandered its precious reserves, and a syndicate of skilled saboteurs was destroying the remaining store! With all national defense rendered helpless for want of it, bitter despair gripped the hearts of the country's millions. Pillage, slaughter, and slavery - misery and death - threatened each American! And Jimmy Christopher, Operator 5 of the United States Intelligence, was gambling his life recklessly in a valiant effort to save his native land from extinction!
The mad Emperor, warrior descendant of the ravagers of Asia, unleashed a new horrible, ingenious weapon against the American people. While Mongols bent over a powerful death machine a thousand miles away, the air became unbreathable! Men and women and children - all living things - gasped for life-giving oxygen, and with searing, heaving lungs fell strangled by the mysterious, deadly element.
A group of bitter men - a secret League of War - was ready to plunge the world into a new, Earth-wide conflict. They issued orders, and bloody organized murder was loosed in the heart of Europe! And behind this carnage, a single man was scheming to make himself the dictator of the world! Never before had a single person conceived such a colossal plan for profiting from the slaughter of humans. He had overcome all obstacles - except one lone avenger, Operator #5, America's Secret Service ace.
James Christopher did not technically belong to the US Secret Service. He was a top agent for an America's unnamed Intelligence Service. It was in his blood. His father, John Christopher, retired from the same agency years before. Answerable only to his superior, Z-7, and carrying a letter from the President of the United States identifying him as Operator #5, Jimmy Christopher played for keeps.
Invisible, secret, deadly, the masked empire wielded its dread power of darkness throughout the nation. Havoc and ruin followed the terror-torn thousands who fled the country to escape the 13th Darkness. America, faced with certain disaster, placed her chance of survival in one man's capable hands - and prayed that the warrior gods might smile once more upon the miracle man of her Secret Service - Jimmy Christopher! Jimmy Christopher, clean-cut, square-jawed and clear-eyed, was the star of the most audacious pulp magazines ever conceived - Operator #5.
Secretly, behind closed doors and guarded portals, the mysterious Black Power of Zaava spread its hidden terror throughout America. What evil force was behind the destruction of churches, the wholesale disappearance of entire congregations? What sinister spell had fallen upon American men and women to make them hurl themselves into white-hot flaming furnaces? A trap worse than death was laid for Operator #5 when, in a final effort to combat this monstrous hidden power, he made his way alone into the Cavern of the Damned!
Mysterious happenings - cloudbursts in the arid desert, churches and skyscrapers horribly destroyed, priests and pastors oddly maddened, intelligence agents craftily slaughtered - all these heralded the attack on America by the Son of Kasma - spokesman for a vicious, Oriental cult. The populace flocked to the new religion in self-defense. Our country seemed helplessly doomed….
As suddenly as Death, the bitter cold came, and with it, the armored tanks, sleek submarines, and mailed warriors of the invading legions! An international syndicate, fearing America's greatness and strength in war, had unleashed savage war-dogs to win the conflict before it fairly began. The greatest military genius of modern times commanded the enemy, and Operator #5 of the United States Secret Service - known to his dearest friends as Jimmy Christopher - was America's choice to oppose him.
The first reports were incredible. Montezuma the Third, Emperor of the new born Aztec Empire, was slaughtering American troops with a deadly, new weapon...sacrificing captives to his ancient gods.... America seemed condemned to degrading slavery. Operator #5, Ace of the Secret Service, fought against overwhelming odds. And while the gods of a long-dead civilization revel in carnage, the very existence of the white race in America is apparently doomed...!
The news spread like wildfire. A man had solved the problem of the ages - he was bringing the dead back to life! Operator #5, ace of the American Secret Service, recognized the grave menace. He realized the danger if the gigantic advances of modern science were employed selfishly by unscrupulous men. And that precisely was the danger facing his native land!
Men blanched at that name - the Scarlet Baron! Ambitious master of the united Underworld, he promised boundless riches for all! But Jimmy Christopher - Operator #5 of the Intelligence - understood the true purpose behind the new plague of rapine and murder. With the gallant Federal G-men slaughtered - with the Secret Service and militia admitting defeat - alone, wounded, and heartsick, Operator #5 seizes the very last chance to save our crime-beleaguered land from shameful serfdom!
A brawny coolie from the filthy waterfront of Hong Kong was Emperor of Asia and master of the vast reaches of Russia. Armed with mysterious new weapons which made the bravest man craven, he marched ruthlessly to conquer the world, and to win the proud daughter of the Muscovite nobility who scorned his amorous advances....
The most deadly weapon in history - a green mist that 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 prepared to surrender humbly - while war scarred a thousand-mile front in Europe - Operator #5, Ace of the American Intelligence, alone, disgraced, challenged the might of the new Napoleon....
By land and by sea, the ferocious Yellow Hordes descend upon the United States, dealing destruction with new and horrifying weapons: with viscid poisons, with lethal gases, with flaming thermite - and with an invisible death-force more fearful, more annihilating than any weapon yet known to man.
No man could explain that death which struck from the stratosphere, turning men into statues, stripping the United States of defenses. Operator #5 - Ace of the American Secret Service - uncovered an espionage organization which was working against our country when Washington recaptured Yorktown, in 1781! But now, a madman with limitless ambition headed the Secret Loyalists, determined to make himself Emperor of America, and Operator #5 takes a million-to-one gamble which brings him face to face with disgrace and death!
Those strange, impassioned orators preached peace and the brotherhood of man - as they tongue-lashed their eager, duped recruits to brutal deeds, bloody violence, and suicide...while dull-witted authorities ridiculed Jimmy Christopher - Operator #5 of the Secret Service - the Dragon Emperor ruthlessly conquered New England....
A happy crowd, inspired by the spirit of Christmas, was milling joyously in Times Square, New York. Suddenly, cutting through the sounds of gaiety, came a shrill whine. It became louder, and at the very second of midnight, a gigantic shell exploded, killing, maiming, and destroying! At 12-hour intervals thereafter - no man knew in advance where - another shell burst devastatingly. Two great powers were openly accused in the newspapers.