Shiroe and his friends have come to the Depths of Palm to reach the Sacrifice Clan's gold.  The underground labyrinth is filled with powerful monsters that wear them down in a war of attrition.  Meanwhile, Akihabara, Akatsuki hears about the "Teachings".  She's very interested to know that by completing a high level raid, she can greatly improve the level of her techniques.
"The Nine Great Prisons of Heilos"? 
I remember that.
Die Neun Verliese von Heilos?
Da werden Erinnerungen wach.
¿Las Nueve Grandes Prisiones 
de Helos? Lo recuerdo.
Les Neuf Prisons d’Heilos…
Ça me rappelle le bon vieux temps.
Quello delle Nove Prigioni dell'Heilos?
Che nostalgia...
As nove prisões de Helos? Eu lembro disso.
Девять геройских казематов… 
Сколько воспоминаний…