This story takes place before Rimuru's reincarnation. Shizu, also known as the Conqueror of Flames, responds to an urgent request calling her to the Kingdom of Filtwood. When she reaches the castle, many adventurers are already there. What request could have demanded such a huge gathering? It turns out a demon has been revived, and the adventurers have been called to subjugate it. It is said that more than ten of the most skilled adventurers have already been killed by this demon. But there is more to this request than meets the eye...
Now that the Silver Wings have fallen,
،الآن بعد أن سقط الجناحان الفضّيان
Mit dem Dahinscheiden der schimmernden
Schwingen haben wir keine andere Wahl.
Ahora que los Alas Plateadas cayeron,
Ahora que los Alas Plateadas cayeron,
Après la défaite des Ailes,
je ne vois que cette solution.
Ora che le Ali d'argento sono state sconfitte
Com a derrota dos Asas de Prata,
Нам не остаётся ничего другого,
раз Серебряные крылья погибли!