College student Iwatani Naofumi is reading a book titled "The Records of the Four Cardinal Weapons" in the library when he is suddenly summoned to another world and told he has to save the world as the Shield Hero, one of the Four Cardinal Heroes. And one morning, he finds all his money and equipment gone.
Unless the calamities wrought 
by the Waves are thwarted,
ما لم يتم التصدِّي لكلّ كارِثة
،تتشكّل بفعلِ الموجات
Wenn das Übel nicht ausgemerzt wird,
das die Wellen verursacht,
Y si no se evitan las calamidades
que traerán consigo, el mundo terminará.
Y si no se evitan las calamidades que
traerán consigo, el mundo está perdido.
Si ces vagues ne sont pas repoussées,
le monde sera détruit.
Se le calamità portate dalle Ondate
non verranno fermate,
A menos que as calamidades acarretadas
pelas ondas sejam impedidas,
Не управимся с бедствиями, что они несут…
и всё живое погибнет.