After completing the side quest "On the Warpath", speak with the natives chieftain, Hirutu (point 10 on the map) and ask him about the prisoner called Slim (100 Glory Points). The chieftain will ask the Nameless Hero what to do with the prisoner. You can either let the natives sacrifice Slim (3 negative soul points), or stand up for him and rescue the man (3 positive soul points). Regardless of your decision, inform the pirate of his future (if Slim was rescued, he can be found on the pirates beach).