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...
This was common knowledge 
among all capable adventurers.
كان هذا أمراً شائعاً بين كافّة المُغامرين الأقوياء
Das wussten alle talentierten Abenteurer.
Era de conocimiento general
entre los aventureros.
Era de conocimiento general
entre los aventureros.
C’était un fait notoire
parmi les aventuriers.
E questa
Isto é um conhecimento comum entre
todos os aventureiros mais hábeis.
И об этом знает каждый хоть
сколько-нибудь сильный авантюрист.