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...
We need the help of all of 
you to defeat this demon!
!نحتاج لمساعدتكم جميعاً لهزيمةِ هذا الشّيطان
Wir brauchen Ihre Hilfe,
um den Dämon zu besiegen!
¡Los necesitamos a todos
para vencer al monstruo!
¡Los necesitamos a todos
para vencer al monstruo!
Pour vaincre ce démon,
chaque homme compte !
Per sconfiggere quel diavolo
Para derrotarmos o demônio,
precisamos da ajuda de vocês!
Чтобы одолеть демона,
нам никак не обойтись без вашей помощи!