Beginning the Quest
When you're ready to begin your second major quest out in the lands of Amaranthine, speak with Mistress Woolsey in the Vigil's Keep throne room. She tells you that the caravan route has been disrupted in the southeast, and that the kingdom can't survive without free-flowing trade (more information about the merchant in the city of Amaranthine. At the conversation's conclusion, you gain "The Righteous Path" quest.
Amaranthine
When you enter Amaranthine, look for Mervis to the north of the Market District (western side of the city). He explains that caravans have been ransacked in the Wending Wood and asks you to investigate. He also promises you a reward if you can stop whoever or whatever is disrupting the trade route. When you're finished in Amaranthine, travel to the new location on the world map: the Wending Wood.