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.
They are the building blocks 
of life in all magical beings.
إنها تبني قوالبَ الحياة في كلّ الكائنات الحيّة
Die Materie, die Monstern
als Lebensgrundlage dient.
Son los bloques de la vida
de los seres mágicos.
Son los bloques de la vida
de los seres mágicos.
C’est l’énergie vitale
de toutes les créatures magiques.
È la sostanza che dona
São os blocos de construção da vida
em todos os seres mágicos.
Источник жизни для магических зверей.