Location: This quest takes place in Worgen Introduction Gilneas.

Shortly: Gwen Armstead in Duskhaven sends you to Greymane Manor and wants you to speak with Queen Mia Greymane.

How to: As you accept a horse will take you automatically to the Manor. Climb up and find the Queen Mia Greymane inside.
On a funny note, if you examine the back of the horsed carriage where you get off the horse, you will see Gwen Armstead who sent you here. Apparently she arrived here before you somehow…

Rewards are 45 coppers, 160 experience and 25 reputation with Gilneas.