First things first, you need to get the Route to the Cave itself. The Secular Missionary and her husband know where it is, roughly. So! You need to raise Intimate with the Secular Missionary and Intimate with the Revolutionary Firebrand both to 10. The cards can get pretty rare towards the back end of both storylines, which is frustrating. This sets a short meeting in motion at your lodgings, the conclusion of which will give you Route: Cave of the Nadir 1. You’ll also decide whether you want to trust the Missionary or the Firebrand more. Now you can go caving! Or can you?