While responding to a devastating earthquake in South America, Doc Savage and company discover that not only was the disaster far from natural, but that it seems to be linked to a menace that Doc faced many years before. As he begins to investigate, Doc discovers that a number of closed cases that he had considered to be isolated threats were in fact part of a larger web that he never suspected before now.
While investigating a series of man-made earthquakes that have ravaged South America, Doc Savage finds evidence that links the current case to another which he thought had been closed six decades before, when he and his friends had been all that stood between a private army and the destruction of the lost Mayan empire that was the source of Doc’s vast wealth: the Valley of the Vanished.
While she seems like a sweet old lady to the staff at the nursing home where she resides, only Doc Savage knows that a seemingly harmless elderly woman was once a member of a doomsday cult that threatened to kick off World War III back in the 1970s, and might well hold the key to a mystery that threatens the safety of the world in the modern day.
A new recruit joins the team in 1995, just in time to help Doc Savage and company contend with a group of cyber terrorists who threaten to destabilize the world economy, while in the modern day, the fallout of that case might be the missing piece in the puzzle that Doc is trying to solve.
Doc Savage and his companions have discovered that a number of closed cases that they’ve dealt with over the decades and considered to be isolated threats were instead interconnected, all part of a larger web of crime. And now Doc finds himself at the center of that web, face to face with the man behind it all!