Susan Alison is a beautiful, ambitious woman who is after a legendary treasure of diamonds and emeralds, which are part of the ornament of a tribe of savages in the Ucayale river (a tributary of the Amazon). She flies to Iquitos, Peru, in the company of Hank Rollins, also an adventurer after the jewels. Jane Royce, a really beautiful girl, is also in the jungle looking after her father, a missionary lost while trying to convert the head hunters.