When the shrunken heads of two CIA agents are delivered to TEEN headquarters, Chris Cool and his Apache Indian fellow agent, Geronimo Johnson, are ordered to Ecuador, to apprehend the sinister donor, a revolutionary known as Cascabel the Rattlesnake. A high practitioner of voodoo, Cascabel has stirred the head-hunting Jivaros into a frenzy––part of his monstrous plan to overthrow the government.

       In Quito, Chris and Geronimo are hired by an Argentine playboy, Fernando Rios, to transport medical supplies to the disease-stricken Jivaros. Suspicious of Rios, the TEEN agents risk their lives to ferret out the Argentine's real motive and at the same time hunt down the satanic Cascabel.

       Mysterious pursuers in the jungle, weird pagan rituals, voodoo curses add up to exciting and gripping adventures in this spy thriller.