Spelunking seemed much more romantic when you first agreed to accept the mission for the Jewel. Untold riches, fame, glory; it seemed so perfect. Now you're a month into the expedition with little to show for it except for a few rock samples and the death of a party member. You're deep inside the fifth layer of the Earth's crust, surrounded by tight shafts and ominous pits. You are quickly descending to the sixth and final layer; the resting place of the fabled Jewel.