You begin facing a plain wooden door with the number three twenty one on it. Look to your right and move out into the hallway you can see, to the right. You should come upon one open door to your right as you continue down that hallway, move through that open door, into a massive empty space. Continue heading dead forward until you're aligned with the second pillar on the right. Once you're there proceed into the left hand corner. Once you've taken a step towards that far left hand corner, you're done.