Mikami Satoru, a businessman, is stabbed by a criminal on the street and killed. When he regains consciousness in the darkness, he finds that he's been reincarnated as a slime! With nothing better to do, he spends his time devouring all the rare herbs and precious ores he comes across. As he does, he encounters the Storm Dragon Veldora, who was sealed in this cave 300 years ago by a hero's "Unlimited Imprisonment" skill. He's frightened at first, but as they talk, he becomes friends with the long-isolated Veldora.
Most would be unable to withstand having 
only their soul traverse worlds.
ما كان معظم النّاس ليتحمّلوا مجرّد انتقال
روحهم من عالم لآخر
Eigentlich erträgt man es nicht,
nur als Seele in eine andere Welt zu gehen.
La mayoría no soportarían
que solo su alma viajara aquí.
La mayoría no soportarían
que solo su alma viajara hasta aquí.
Normalement,
une âme est incapable
Di solito l'anima da sola 
non riesce ad attraversare i mondi.
Afinal, não é comum resistir à viagem
entre mundos na forma de alma.
Обычно одна только душа
не способна перейти из мира в мир.