Ep 1. The Proud Fallen Angel

In the first episode of Seven Mortal Sins, titled "The Proud Fallen Angel," we are introduced to the protagonist Lucifer. She is a high-ranking angel who has been banished from Heaven by God for her rebellious attitude and refusal to follow orders.

As Lucifer descends from the heavens, she is approached by the demon Leviathan who offers to serve her in exchange for her power. Despite being initially skeptical, Lucifer sees potential in Leviathan's unwavering loyalty and accepts her offer.

Lucifer then travels to a city on Earth where she is greeted by Belial, another high-ranking demon who has the power to manipulate minds. Belial senses that Lucifer has lost her power and offers to help her regain it by stealing an artifact from Heaven. Lucifer agrees to the plan, and Belial introduces her to the thief, Mammon.

Mammon is a greedy and cunning demon who agrees to steal the artifact in exchange for a large sum of money. However, their plan is soon compromised by the arrival of an angel named Michael who has been sent to retrieve the stolen artifact.

As the group fights Michael, Lucifer is reminded of her past and begins to question her current path. Despite this, she manages to defeat Michael and reclaim the artifact.

The episode ends with Lucifer reflecting on her actions and realizing that she must continue to follow her own desires, even if it means going against Heaven and Hell.