An awesome legion of master criminals launch a devastating series of raids that set the entire east coast of America aflame. Skyscrapers explode, ocean liners disappear, key witnesses are kidnapped and brutally murdered as the holocaust rages. In a desperate race against time, Doc Savage attempts to discover the true identity of the twisted brain who rules the silver-costumed marauders while the mysterious Ull and his army of hooded assassins move closer to their grim objective of World Domination! with Patricia Savage!