Los Chimpos Ride Again

You pick up and unfurl another piece of paper.
Again, it is a map.
This map has the word "Beneath" written at the top in a fancy script.
It then shows what seems to be a cave system; various chambers are crudely drawn with some small pictures within each chamber.
There are at seven chambers.
Two of which are empty, one of which has a drawing of a small square item, and the remaining four have a skull and crossbones drawn in their centre.

You open the third piece of paper.
This one is not a map but a sketch of a woman.
She stares defiantly out at you from the page.

You roll all three papers up again and stash them in your bag, which is slung over the back of the chair.

You have 1 choice: