You need to complete the Caves of Westwold adventure first. If you click Adventures for this location in Hawklor, you'll see it. That's a fairly easy adventure and the experience rewards are nice. Then, after you take care of the Gobblin problem, the quest you seek should become available. I wouldn't advise it though unless you have a fairly high melee rating. Most of the monsters, which seem to be insects of one kind or another, are quite strong. Anyway, after completing the Westwold adventure, you might be stopped by somebody on your way into the Stoneback Tavern. This mysterious stranger asks you for your help. He'll give you a pouch of twelve Adventurer Tokens as an advance payment. After that, if you click Adventures for this Location, there should be a quest called A Little Matter about an Orb. Like I said though, I don't know that I'd undertake that quest unless your melee rating is fairly high or, at the very least, you have decent levels in Restoration or other powers, decent being forty or higher. While you can run from most fights, there are a few that'll keep coming if you flee from them, so you do have to win them. These are usually harder fights where the game gives you those oh-so-encouraging statements about how the enemy could crush you with one blow. I also noticed that enemy encounters in that ruined castle seem to be almost insanely high, so you may want to use disgression when taking on that adventure. You do get another Adv Token reward for completing the quest though, and the EXP reward is rather nice.
Completing the Caves of Westwold also unlocks part one of the three-part Giants adventure, but I definitely wouldn't advise undertaking that quest until you've got a melee rating above sixty, above seventy if you can swing it. The experience and monitary reward for completing that three-part quest is one of the best I've ever seen, but it's not for the newby. Neitheris the orb quest, so you may want to wait.
But wait, what's that? A transport! Saved am I! Hark, over here! Hey nonny non, please help!