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...
You have disgraced yourself 
by aligning with these demons.
لوّثت نفسك بالعار لوقوفِك في صفِّ هؤلاء الشياطين
Jemand wie du, der sich mit Dämonen zusammentut
und Schande über uns bringt,
Te pones en vergüenza
aliándote con esos demonios.
Te pones en vergüenza
aliándote con esos demonios.
Les démons comme toi
sont la honte de notre espèce.
Della spazzatura che
vive mischiandosi alle altre razze
Um demônio como você,
que desonra o clã dos demônios,
Позорник, связавшийся
с жалким отребьем,