The prideful archangel Lucifer disobeys God and is cast into the lowest level of hell as a fallen angel. On her way to hell, Lucifer happens to meet a high school girl on Earth named Maria, who helps her. In hell, Lucifer meets Leviathan, and Leviathan explains to Lucifer about The Seven Deadly Sins, the seven demon king rulers of hell. After The Seven Deadly Sins seal Lucifer's powers, Lucifer goes on a journey with Maria and Leviathan to defeat them.

Eri Kitamuraas Lucifer (voice)
Akane Fujitaas Leviathan (voice)
Arisa Sakurabaas Satan (voice)
Ai Kakumaas Belphegor (voice)
Yoko Hikasaas Mammon (voice)
Yui Oguraas Beelzebub (voice)
Chiaki Takahashias Asmodeus (voice)
Shizuka Itohas Belial (voice)
Azusa Tadokoroas Astaroth (voice)
Megumi Todaas Maria Totsuka (voice)
Masaru Yokoyama
Hiroaki Tsutsumi