Along with their new friend Eugen, Gran and his crew fight a fierce battle with Leviathan–a once peaceful primal beast that has gone berserk from dark essence. Though the party is successful in pacifying the beast, numerous unanswered questions keep tensions running high. Who is the Black Knight? And why does that "doll" follow in tow? What are their intentions? In search of the truth, Gran and his friends hastily pursue the mysterious pair deep into the forests of the Lumacie Archipelago...