Talk to the guy standing there and go left, you should be transported to heaven. You can talk to the people north, east, south-east and south of where you start, but that's not required. Go west a couple of times till you see the arches, go up now and keep going, you will be transported to hell. Keep going up and kill all the baddies on your way. Check the well now and you'll be transported again. Read the sign, and you've finished the d-mod!