You wander around and kill a bunch of low-level enemies that you can all basically one- or two-shot with your awesome pistol, and get tons of weird little game gems. You have absolutely no idea where you are right now, but you think you might have found what you're looking for. Which is a hole in the ground with voices inside calling for help.
You say hey can you guys climb a rope. They say yes please help us!! You say OK hold on.