Simon Scania ist das nächste Ziel für Toru, Chaika auf ihrer Suche nach König Gazu. Um ihn zu finden, müssen sie in das "Tal ohne Wiederkehr", das diesen Namen gewiss nicht umsonst trägt.
Guy informs Toru and his group that the next Hero they can find, Simon Scania, was last seen at The Valley of No Return four years ago. However, they are ambushed by the Gillette Corps before escaping using Fredrika's Dragon form. Arriving at the valley, they noticed a fog made by magic in the valley before Toru, Akari, Chaika and Fredrika accidentally falling in. In the fogged valley, Akari, Chaika and Fredrika, in a protective barrier, notices the fog causes illusions which Toru believes he and Chaika survive the fall and became a couple only for Gillette to take her away. The trio manages to drag Toru into the barrier, where they decide to destroy the machine that makes the magic fog. Using Chaika's magic to temporarily dispel the fog, the group manages to find and destroy the machine. With the fog cleared, the group finds Simon, now mad and delusional. Simon reveals he created the fog machine in revenge when his wife and his best friend betrayed him in order to show anyone going into the fog the pain of being betrayed by a loved one. After getting Arthur's leg from the machine, the group leaves Simon behind while the girls question Toru on his illusion.
Le mystérieux Guy apparaît à nouveau devant Tôru, Akari et Chaika. Il leur indique le prochain endroit où se rendre pour trouver un morceau du corps, avant de disparaître à nouveau. De son côté, Albéric, toujours à la poursuite du trio, se rend à Ladémio. Un nouvel affrontement se prépare...
旅を続けるチャイカ一行は次なる遺体を入手すべく、八英雄の一人・魔法師（ウィザード）のシモン・スカニアが４年前、最後に目撃されたというラデミオの街にたどり着く。
そこでは、霧深く、立ち入った者は二度と帰らないという“還らずの谷”の存在がささやかれていた――
崩れた崖から“還らずの谷”の底深く落ちていったトールが見たものとは！？
「いままでありがとねトール。さようなら」「……待て、…待ってくれ、チャイカ！」
기이가 가지고 온 또다른 8영웅의 정보, 그것은 코닉세그 왕국의 마법사 시몬 스카니아에 관한 것이었다. 토루 일행은 그가 4년 전 마지막으로 목격된 마을, 라데미오로 향하였는데…
