Dungeon Crawl Classics #86

The Lady in Blue, a mysterious figure of cosmic power, enlists a band of simple peasants for a strange task. They are to follow an invisible bridge until they arrive at a hole in the sky - and then jump through. Death awaits all but the bravest, strongest, and luckiest, but the Lady offers a reward beyond all the riches of the world: the chance to change the very stars these peasants were born under, and thus change their destiny.