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...
Eat through the ruin and soar, Bisco!
!كُل الأنقاض وحلّق يا بيسكو
Verschlinge diese Zerstörung
und flieg, Bisco!
¡Devora la ruina y vuela, Bisco!
¡Devora la ruina y vuela, Bisco!
Purge la ruine !
Envole-toi, Bisco !
Mangia le rovine e sollevati in aria, Bisco!
Coma a ruína e salte, Bisco!
Загрызи опасность и лети, Биско!