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...
How remarkable that a mere human is capable 
of using Ifrit's power at this level.
كم من المُميّز أن تتمكّن مجرّد بشريّة
من استخدام قوّة إيفريت بهذا المستوى
Dass ein normaler Mensch
die Kraft Ifrits so im Griff hat.
Es increíble que un humano sea capaz
de usar el poder de Ifrit a este nivel.
Es increíble que un humano sea capaz
de usar el poder de Ifrit a este nivel.
Une simple humaine,
maîtrisant la puissance d’Ifrit…
Incredibile che un mero essere umano
É notável que uma simples humana seja
capaz de usar o poder de Ifrit a tal nível.
Жалкий человечишка… а сумела
 настолько подчинить себе силу Ифрита!