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.
This world is covered in snow and ice,
،هذا العالم مغطّى بالثلج والجليد
Diese Welt ist bedeckt
von Schnee und Eis.
El mundo está cubierto de nieve y hielo,
El mundo está cubierto de nieve y hielo,
Ce monde est recouvert
de neige et de glace.
Questo mondo è ricoperto di neve e ghiaccio,
O mundo está coberto por neve e gelo,
Мир снаружи покрыт снегом и льдом,