The next time you are in Balterossa, head for the Cafe Moon Dust. Upstairs, in the back right corner, talk to a man named Paris. He has agreed to meet his love at a castle that is unfortunately full of monsters. Another coward, he wants you to do the clean up. When you get to the castle, head forward until you come to a y intersection, where both paths are blocked by odd doors. Head towards the left door and look to your left, you should see a pathway. Follow this until you come to another fork and head left. Now head back to the area with the two creepy doors and go up the hallway to the other door, you will notice another passage on the side, take it. This passage will come to a T head, go left. Eventually you will come to a 4 way intersection, make a right here, and then a right at the next T intersection. Up here you'll find an excavation point of interest, but nothing else really. When you come to the last y take the left path. When you enter a large room, you'll trigger a cut scene and a boss battle. He is not that hard to beat.