Crisis. Our contraptions rely on ubiquitous public steam power, but the mines are empty, and reserves are dangerously low. We've decided to send a crew of specialists into the oldest tunnels to find a new source of fuel. I see from your file you've had... pecuniary difficulties. We would be indebted to you in a... literal sense. No one remembers what those caves hold, but that's little matter for someone... such as you. Will you do it?