It began with a series of quakes which tore huge, gaping holes in the surface of the earth. Soon the sky over the Northwest was filled with the bodies of strange floating men playing a weird melody of death. Was the world doomed? Could Doc Savage and his Fabulous five save it from almost certain destruction? Join them as they race to the center of the earth for a titanic battle with the power-crazed leaders of a fantastic super-civilization.