Young Dai lives on Dermline Island, where he dreams of being a Hero. One day, a Hero and his companions come to the island. Dai is excited at first, but their true intent is to steal his best friend, Gomechan, the mythical Golden Metal Slime.
Everyone who can still fight, come on!
!إلى كل من لا يزال قادراً على القتال، تعالوا
Alle, die noch kämpfen können,
versammelt euch!
¡Todos los que puedan pelear, reúnanse!
¡Que se reúnan
todos los que puedan pelear!
Tous ceux qui peuvent
se battre, avec moi !
Chiunque sia ancora in grado
 di combattere venga qui!
Quem ainda conseguir lutar, vem pra cá!
Придите все, кто может сражаться!