Required quests
Main dialogue
Wow, you're here! 1101002 gave you an outline, right? Then let's cut to the chase. Ereve is an island protected by the Shinsoo, which means no force of evil can enter the island. Even if someone did enter, the person would have been noticed right away.
The problem is, we were unable to spot the intruder this time. That's because the thief is the member of the Black Wings, 9001009 1104001. We detected an intrusion, but we were unable to spot the fake. So while people were panicking, the thief brazenly breezed through and stole the treasure.
That is the one item that SHOULD NOT be at the hands of Black Mage! Since 9001009 has yet to leave Ereve, I want you to join in on the search as well. If you meet 1101002, you'll be able to receive a 4032179 that requires rummaging through Ereve.
Okay, now I want you to defeat 9001009 and bring back the treasure! I, as well as other members, will also aid you in the search.
Accept
9001009 is most likely disguised as one of the Knights. The appearances may change, but the inner self won't, so I suggest you keep talking to various Knights until you hear something that doesn't sound like it would come from a Knight. If you do, you can consider that individual 9001009 and attack immediately.