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...
If they failed, there aren't enough 
lives between all of us to survive this!
إذا كانا قد فشلا فهذا يعني أنّ لا فرصة
أمامنا للنجاة
Wenn die es nicht schaffen,
wie soll es dann unser aller Tod?
Si ellos fallaron,
no seremos suficientes para esto.
Si ellos fracasaron,
no estamos cualificados para esto.
Si aucun n’est revenu,
nous allons tous y passer aussi !
Se non ci sono riusciti loro,
Se eles falharam, não tem vida suficiente
aqui pra que todos sobrevivam!
Если уж им сил не хватило,
то мы точно ни за что не справимся!