Hired to transport an illegal cargo, Willard reluctantly agrees to take both women with him after Beth, withholding information vital to his livelihood, promises to divulge it only if he becomes their guide.

The tribe is the vestige of the city of Pikaho, a primary diamond mining centre, which was swallowed by a volcanic eruption in the 12th century.

Afterwards, the entire male population perished due to a disease spread by the eruption, and Pikaho turned into an all-women society considered nothing more than a legend.

To ensure the survival of Pikaho, its Queen (Bernadette Lafont) allows a victor among them to mate with any man who visits or is captured by the tribe.

Aided by Beth and the Queen's henchman, D'Arcy (Jean Rougerie), Gwendoline, disguised as a Pikaho warrior, wins this right.