Right now you're facing a wall. Take a left turn and move through the passage. After you reach the end of the passage take a right turn. Now you can see an another passage move forward where you can find a wall on the right side and on the left side you can see a black bench. Move little forward and take a left turn, where you can see an opened door. Enter into that room through that door, now you can find a lamp at the corner of the room and that is the end point.