Giant scorpions wreck havoc after being released due to volcanic activity

In the Fabulous Thirties, Doc Savage and his five Amazing Adventurers are sucked into the mystery of Doc’s father disappearing in the wilds of South America. The maniacal Captain Seas tries to thwart them at every turn as they travel to the country of Hidalgo to investigate Doc’s father’s death and uncover a vast horde of Incan gold.

The neighbors of a frontier family turn on them when it is suspected that their adopted daughter was stolen from the local Kiawa tribe.

Mrs. Anna Leonowens and her son Louis arrive in Bangkok, where she has contracted to teach English to the children of the royal household. She threatens to leave when the house she had been promised is not available, but falls in love with the children.