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...
I'm sure someone will do something 
about that demon someday.
أنا متأكّدة أنّ شخصاً ما سيفعل شيئاً
بشأن ذلك الشيطان يوماً ما
Um diesen Dämon …
Seguro que alguien se encargará
de ese demonio algún día.
Seguro que alguien hará algo
con ese demonio algún día.
Ce démon,
Spero che qualcuno
Algum dia alguém dará um jeito
naquele demônio, certo?
И с этим демоном…