From publisher blurb:
What happens when player characters are defeated in combat? What happens when they don't win the climactic battle? Most times, it is assumed they die and, after some understandable disappointment, the players roll up new characters.
Fall Into Darkness offers an alternate way of handling the party's defeat at the hands of their enemies. In this adventure, the characters are instead captured and taken to a legendary place in the desert where captives are tossed into a deep, black abyss. The characters have one last chance at saving themselves and an opportunity to get stronger in the process.
Fall Into Darkness is an adventure for Darwin's World, Nuclear Edition designed for Novice characters but can easily be adapted for more powerful characters.