Japan has become a wasteland devastated by the Rusty Wind which causes all things to rust away. A suspicious looking priest visits a checkpoint all alone, yet on his back rests a bow priests wouldn't use.
Meanwhile, Milo, a doctor running a clinic in the town of Imihama, is researching new medicines in secret in order to save his older sister, Pawoo, who's being corroded by the Rust. But that day a stranger appears before him...
Don't breathe in the spores or you'll rust!
!لا تستنشقوا البويغات وإلّا صدأتم
Atmet die Sporen nicht ein,
sonst rostet ihr!
¡No inhales las esporas o te oxidarás!
¡No inhales las esporas o te oxidarás!
Ne respirez pas les spores !
Non inalate le spore o prenderete la Ruggine!
Não respirem os esporos! 
Senão vai enferrujar!
Не вдыхайте споры, заржавеете!