The well-known hero of the kingdom, Auvelliana Cosmo, was the best mage that ever lived. She won 2 big wars in her lead. Yet, she was never satisfied with her accomplishments. Eaten by guilt, she knew one day that she will have her karma. Which she did. But she didn't expect that she will literally pay for her sins, by earning good merits in her 'second' life. She needs to gather good points to pay for her sins, and the fastest way she can collect them is to stop the greatest villain and her nemesis from his crimes--by being his wife.

Being an S-Class demon, it was hard for Lucrezia Mammon to be summoned. In today's age, mortals have different ways to summon demons and make deals with them, but it is close to impossible to summon an S-Class, who can grant any wishes. It has been 2 millennia since she was summoned. Being an S-Class demon doesn't mean she doesn't have bills to pay--in fact, she's already bankrupt. Due to this, it was almost a 'blessing' when she a mortal managed to call her. But she didn't expect that this blessing of hers would test her patience to the fullest. However, she's ready to grant her master's wish in exchange for bathing in gold and be once again, rich.

For the main characters to have their happily ever after, the antagonists of the story needs to pay for the crimes they've done first. That's why Xeiris Lumiere Paladin -- the greatest villainess, was in front of everyone in the kingdom for her execution. Facing death then facing life in a split second, rather than the afterlife, Xeiris found herself in a place before life--in front of the creator. For her to find out that her life, was all written. Despair and full of hatred, Xeiris can't accept the unfair life she had. Giving her a second chance to live again by the creator, she had the resolve to change her fate. This time, she's not going to follow the story's plot where she's bound to die in the main characters' perspective, for them to have their happy endings. In this story, it will be in the Villainess' POV.

In a novel, there is always a character that readers hate the most. And in the book 'The Priestess' Shadow', it was Seravina Araneae Bleiz. Despite not being the main antagonist, she is the most hated character of the novel--and she loves it. It made her think that her role was effective. Aware of the readers' thoughts and comments, it was a hobby of hers to read their hate speech about her. Not until for the first time, she received a compliment from a reader.

Transmigrating to a story sounds perfect, it's a dream most readers would have. Jurlian also dreamt of waking up one day to one of the stories she had read-- and the universe heard her wish. But it wasn't a romance story, nor a historical one where the Crown Prince or the Villain falls in love with her, it wasn't even a fantasy story, nor an adventure. The moment she opened her eyes, she wasn't greeted by a prince, but a detective. It wasn't a book she was hoping to get transmigrated to, rather, it was the opposite. A mystery/ thriller and crime book that she has read once and dropped. The plot didn't catch her interest, and she didn't like the main character's personality, Sherlock Holmes.