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 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!

First published in Doc Savage Magazine # 20 October 1934 - written by Lester Dent.