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.
That's why we're testing it out!
!لهذا نحن نجرّبها
¡Por eso hay que hacer pruebas!
¡Por eso hay que hacer pruebas!
C’est pour ça
que tu vas servir de cobaye.
È per questo che lo verificheremo!
É por isso que nós vamos testar!
Вот и проведём тестовый полёт!