Herman Schiller was a German-American Bundist and stage magician, from Yorkville, Manhattan, New York City, who attached himself to Japanese Military Intelligence, in the months before the Second World War got started.
Months later in Tibet, three supernatural Furies, the Terrible Sisters from distant Orion, manifested themselves to decree that the destiny of the Tori Tribesmen now lay with "the Yellow Men from the Burning Islands." Sindu the Prophet shall be their leader, in a war against the White Men. Sindu and his followers rally up thousands of horsemen, there in the Himalayas, and attack an American Garrison. But Uncle Sam and Buddy have arrived at this fort, in a warplane, shortly before the horde does. The Tibetans hurl themselves against the fortress and many are able to scale the outer wall, but they meet withering gunfire, and perish in great numbers.
From the battlement, using binoculars, Uncle Sam spots Sindu in the distance, urging his tribesmen onward. He and Buddy board their airplane and fly it to Prophet Headquarters, where Sam leaves Buddy to man the swivel machine gun, while he sprints forward to confront Sindu. They duke it out, while Sindu's bodyguards charge at the plane; Buddy shoots at least five of them. Sam knocks out Sindu and drags him aboard the plane, and they take off, drop a payload of bombs on the Tori, and leave. Bereft of their prophet, the Tibetans are badly demoralized, and the attack on the fort collapses.
Sam and Buddy's new plan is to carry Sindu away to Chun King, where Army Intelligence would have a few questions from him. But behind them, Sindu has got his hands free, and pulls some crystals from his pocket, and holds them outside the plane. Four strange aircraft appear ahead, and when Uncle Sam engages them, they seem to be bulletproof. While that distraction goes on, Sindu straps on a parachute and leaps out of the plane. The other four planes vanish. Then the weather turns very bad, forcing Sam to land; Sam and Buddy search for Sindu on the ground, until the wind and rain drive them to seek shelter. They duck into a cave, and after walking in it for a while, they find Sindu, dead, in an alcove, laid out neatly with his hands on his chest. After more searching, they find a vaudeville-style dressing room, with Herr Schiller inside. On the wall hangs a Tori Tribesman suit and a fake beard. Schiller covers Uncle Sam with a pistol, and thus makes himself overconfident enough to answer honestly when Sam accuses him of impersonating Sindu. Then Sam punches him, seemingly out. But Schiller picks himself off the floor, pulls out his crystals, and fills the chamber with fire. Unc and Buddy notice that they can see but not feel the flames, which buys Schiller enough time to slip behind them and head-konk both of them unconscious with the butt of his handgun. He ties them up with special magician knots.
Schiller drags them both out of the cave and loads them aboard their own airplane. He figures his best chance now is to bring Uncle Sam, alive, to his old Japanese bosses, and hope to get a break from them, because otherwise his whole tribal revolution scenario is a complete failure. So he flies to Tokyo, and lands at an isolated airfield, seeks out the boss of Military Intelligence, and tells his story. The General accepts it, then hands a dagger to Schiller, and directs him to perform Hara Kiri, right there and then. Having heard enough, Uncle Sam bursts free of his ropes by expanding his chest to full size, then thrashes some of the officers. Amid the melee, Herman Schiller escapes. He flees to Tahiti, to Midway, to New Guinea, and finally to some cheap dive on a far eastern waterfront. There he is overtaken by Uncle Sam and Buddy. Sam knocks him out and takes him away for the FBI.
