The Cage Enigma

The Cage Enigma (Script): One cage, five prisoners, one survivor: who when up was open down was closed, who when open was there closed was not, who when standing up was upside down (Stonehenge, England, unknown author). Five prisoners in a cage on top of a mountain. There's nothing in common between them, except that they don't know how they got in and how to get out. The mystery gradually unfolds to reveal the unthinkable.