This quest is not available in game.
Speak with Sirra Von'Indi in Darkshire.
The weathered grave marker reads simply:
<Upon further examination, you notice that dirt over the grave has been recently disturbed, and that a good amount of the dirt seems to have been displaced...>
You will also receive:
- 610 experience
- 3 60 (if completed at level 90)
- 25 reputation with Stormwind