Just outside of The Wengari Fortress, you found a survivor from The Nomad Camp. From his dress and demeanor, he seemed to be one of their leaders. His plan was to wait until night and sneak in to free the nomads the Wengari had taken captive. He asked you to join him, but you preferred the direct approach.
When you found the feeding pens where the captives were held, you defeated the Wengari Beastmaster and his ravenous pets. You then freed the captive nomads, returned to Heoborea, and spoke again with their leader.