I tried to save a man who'd been caught by slavers. Unfortunately, he perished in the attack... but not before giving me this map, which led me here.

[He definitely wouldn't have been as interested were it not for the circumstances. Running around following some vague treasure map seems a foolish endeavor at best. But, well, he could sympathize with the man's initial situation... and the fact that he'd died had made it all the more important to do him this favor.]