Talk to Bendah and learn of the crevasse that has opened in the Plains of Jarin. Follow the quest marker by heading west, then turn left to take the path through the trees. Head south until you past the Resurrection Shrine then turn left and the crevasse is located along the cliff wall there. The fissure will take you to the Caverns Below Kamadan. Upon arrival, make your way through the caverns. You will encounter some various corsairs that should be no problem for level 20 characters. Meet up with Ogden Stonehealer and Vekk.