Seiichi and Saria train under Artoria to become adventurers. During their training the three of them are teleported into a dungeon by a demon’s trap.

The dungeon they find themselves in the stronghold of the Black Dragon God, the strongest member of the Demon Lord’s Army. Artoria gets separated from Seiichi and Saria in the dungeon and the giant Black Dragon God appears before her. Then that overwhelming threat attacks! Can Seiichi and Saria save her in time?!
This is just like that time with Xeanos.
هذا مثلما حصل مع زيانوس
Das ist doch wie damals bei Zeanos …
Es como el libro de Xeanos.
Es como el libro de Xeanos.
C’est comme avec Zeanos ?
È come quella volta con Xeanos.
É a mesma coisa que
aconteceu com Xeanos.
С Зеаносом было... точно так же.