 On Halloween night, two couples meet at one of their houses for drinks and hors d'oeuvres before planning on heading out to a massive party.Dressed in their finest costumes (witch, cowboy, doctor, and Queen Elizabeth I), the hostess brings out a bottle of blue wine she picked up in Peru.Based on an old Inca recipe, the wine supposedly has truth-telling properties and is brewed from the skins of blue dart tree frogs.