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.
A paradise said to exist 
in the outside world.
جنّة قيل بأنّها موجودة في العالم الخارجي
Un paraíso legendario
en el mundo exterior.
Un paraíso legendario
en el mundo exterior.
C’est le paradis légendaire
se trouvant dans le monde extérieur.
Si dice che sia un paradiso
che esiste nel mondo esterno.
Um paraíso que dizem
existir no mundo exterior.
Так в легендах называют
прекрасный мир за пределами стен.