Dispatch it and look inside the desk to find Documents from Lab X18, part 4. When the player approaches, a bright flash will blind him for a moment and the ghost will have been replaced with a Zombie.
A 'ghost' can be seen sitting on a chair behind the reception's desk. Walk down the staircase from the main entrance into the reception room.
This will give the player a main mission chain for Duty inside: (Refer to Dark Valley for the previous part of the storyline section).
