In an underground shelter-city encased in ice, Setsuna meets a young girl named Rinne and begins helping her with a mysterious invention. It can apparently help save the world, but its true nature is unclear. Meanwhile, the city itself will very soon perish.
There's an unused staircase 
behind here, right?
توجد سلالم غير مُستعملة خلف هذا
المكان، صحيح؟
Ist hinter dieser Wand nicht eine Treppe,
die nicht genutzt wird?
Por aquí hay escaleras
que nadie usa, ¿verdad?
Por aquí hay escaleras
que nadie usa, ¿verdad?
Il y a un escalier condamné
de l’autre côté, non ?
Qui dietro c'è una scala inutilizzata, vero?
Tem uma escada abandonada
aqui atrás, não é?