[Sherlock Holmes] London's Exorcist's Journal

In a frenzied steampunk age, where people drown in luxury and live under crushing oppression, they seek the ultimate madness through all kinds of supernatural rituals. In this city of sin, no one's heart can be fathomed. In a world overrun by the supernatural, the fear of the unknown feeds demons. Catherine, cousin to the famous detective Sherlock. Born into a respectable family, she loves life, has plenty of friends and varied interests, and is adored by everyone. She serves as a junior exorcist for the Church, is a formidable fighter, and guards London's nights. * One day, by sheer coincidence, she attends the mysterious banquet that high society clamors to be invited to. At the banquet, she sees a mermaid who looks strangely familiar. The dazzling creature makes her shiver. When she wakes, a remarkably handsome man is sleeping beside her. His skin is smooth and fine, and his features are so perfect they seem unreal. He has no warmth. His icy fingers touch her arm and coil around her. Catherine grips her dagger in terror. “Good morning,” he says, his voice slightly hoarse, sweet as a song. And just like that, Catherine has a clingy pet who refuses to leave her alone. Everything goes off the rails. Her cousin Sherlock, who has “come back from the dead,” tells Catherine to keep an eye on the mermaid. “What could possibly be so special about a mermaid?” Catherine grumbles. Until the mermaid reveals his true identity. He is the Napoleon of the criminal world, the ruler of the underworld: Lord Moriarty. “Love is a disease, Catherine.” * As one bizarre case after another unfolds to the sound of Whitechapel's bells, the indescribable draws back the curtain. Justice and evil meld together in London's inescapable fog. “Would you like to glimpse the truth?” He is beautiful, strange, and cunning, a bloodthirsty demon in the dark. He is also a piece on Catherine's chessboard. Together, they play a game against the world of darkness. [Reader's Guide] 1. A partially fictionalized setting (Victorian era + Art Nouveau era + steampunk), with supernatural fantasy elements. 2. A crossover of classic literature, mixed with historical events and a touch of cosmic horror. OOC! 3. Both the heroine and hero have some inhuman traits! All blurbs have been filed for approval! Theme: A heart for justice!