While responding to a devastating earthquake that ravaged South America, Doc Savage and company discover that not only was the disaster far from natural, but it appears linked to a menace that Doc faced sixty years before! As the investigation proceeds, Doc uncovers a vast conspiracy connecting his many closed cases, spread across the decades and involving doomsdays cults, the lost Mayan empire, cyber-terrorists, and World War II! Who is responsible… and will the Man of Bronze free himself from the center of this treacherous web?