Variation of Serpent of the Incas. Jenny is taken to the Inca Valley and bargained away instead of trinkets for the favor of long lost undocumented tribes in return for her husbands search for secrets of Manco Inca.
Unsuspecting wives and daughters are given a powerful hypnotic drug allowing them to be put into an altered state. While in the altered state, they unknowingly will perform any sex act that a member of the private club requires. When returned to their normal state, they are totally without any knowledge of what went on or what they did while in their altered state.
When the sales team--Madison, Kitty, and George--suddenly find themselves unemployed, but still on the company expense account, they plan their last evening together. Good wine, of course. Fine food. And a stimulating game of Truth or Dare that leaves them naked and aroused.