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.After the Kingdom of Liones faces a new threat, the Seven Deadly Sins split up in order to defeat an enemy force spanning Britannia. With their members divided, they face 3 powerful foes, attempt to rescue the lost part of a dear friend, and begin their rescue of Elizabeth. However, all is not quite as it seems. Along the way, the truth of what brought the end of the Holy War 3000 years ago is uncovered, causing old friends to come face to face against each other. Nanatsu no Taizai: Fundo no Shinpan continues the adventure of the Seven Deadly Sins and their friends, and sees a great power released.