For a fact-finding mission, the excursion north to the demons’ isle has left Shiro with considerably more questions than answers. Who is the mysterious merchant named Jilvared? Why had he been so eager to get Celes to join his side? A hume who can enslave powerful demons and order around a legendary dragon isn’t to be taken lightly! And what about the Setting Sun, the merchant guild he belongs to? After exchanging a few terse words with Jilvared, Shiro now knows the guild’s main goal is to assassinate the demon king. But to what end? Whatever the case, he has to put a stop to the guild’s plans, so he enlists Ney—the guildmaster of the Fairy’s Blessing branch in Ninoritch—to help him in his endeavors to find out more about the elusive Setting Sun. After agreeing to go to the royal capital to do some digging, they make preparations to set off, but before they leave town, a few of Shiro’s usual crew unexpectedly fall ill. Can he find out what’s wrong with them in time?